<?php

namespace PhpOffice\PhpSpreadsheet\Writer\Xlsx;

use PhpOffice\PhpSpreadsheet\Chart\Axis;

> use PhpOffice\PhpSpreadsheet\Chart\ChartColor;


use PhpOffice\PhpSpreadsheet\Chart\DataSeries;
use PhpOffice\PhpSpreadsheet\Chart\DataSeriesValues;

< use PhpOffice\PhpSpreadsheet\Chart\GridLines;


use PhpOffice\PhpSpreadsheet\Chart\Layout;
use PhpOffice\PhpSpreadsheet\Chart\Legend;
use PhpOffice\PhpSpreadsheet\Chart\PlotArea;

> use PhpOffice\PhpSpreadsheet\Chart\Properties;


use PhpOffice\PhpSpreadsheet\Chart\Title;

< use PhpOffice\PhpSpreadsheet\Shared\StringHelper;



> use PhpOffice\PhpSpreadsheet\Chart\TrendLine;


use PhpOffice\PhpSpreadsheet\Shared\XMLWriter;
use PhpOffice\PhpSpreadsheet\Writer\Exception as WriterException;

class Chart extends WriterPart
{

<     protected $calculateCellValues;
< 


    /**
     * @var int
     */
    private $seriesIndex;

    /**
     * Write charts to XML format.
     *
     * @param mixed $calculateCellValues
     *
     * @return string XML Output
     */
    public function writeChart(\PhpOffice\PhpSpreadsheet\Chart\Chart $chart, $calculateCellValues = true)
    {

<         $this->calculateCellValues = $calculateCellValues;
< 


        // Create XML writer
        $objWriter = null;
        if ($this->getParentWriter()->getUseDiskCaching()) {
            $objWriter = new XMLWriter(XMLWriter::STORAGE_DISK, $this->getParentWriter()->getDiskCachingDirectory());
        } else {
            $objWriter = new XMLWriter(XMLWriter::STORAGE_MEMORY);
        }
        //    Ensure that data series values are up-to-date before we save

<         if ($this->calculateCellValues) {



>         if ($calculateCellValues) {


            $chart->refresh();
        }

        // XML header
        $objWriter->startDocument('1.0', 'UTF-8', 'yes');

        // c:chartSpace
        $objWriter->startElement('c:chartSpace');
        $objWriter->writeAttribute('xmlns:c', 'http://schemas.openxmlformats.org/drawingml/2006/chart');
        $objWriter->writeAttribute('xmlns:a', 'http://schemas.openxmlformats.org/drawingml/2006/main');
        $objWriter->writeAttribute('xmlns:r', 'http://schemas.openxmlformats.org/officeDocument/2006/relationships');

        $objWriter->startElement('c:date1904');

<         $objWriter->writeAttribute('val', 0);



>         $objWriter->writeAttribute('val', '0');


        $objWriter->endElement();
        $objWriter->startElement('c:lang');
        $objWriter->writeAttribute('val', 'en-GB');
        $objWriter->endElement();
        $objWriter->startElement('c:roundedCorners');

<         $objWriter->writeAttribute('val', 0);



>         $objWriter->writeAttribute('val', $chart->getRoundedCorners() ? '1' : '0');


        $objWriter->endElement();

        $this->writeAlternateContent($objWriter);

        $objWriter->startElement('c:chart');

        $this->writeTitle($objWriter, $chart->getTitle());

        $objWriter->startElement('c:autoTitleDeleted');

<         $objWriter->writeAttribute('val', 0);



>         $objWriter->writeAttribute('val', (string) (int) $chart->getAutoTitleDeleted());


        $objWriter->endElement();


<         $this->writePlotArea($objWriter, $chart->getPlotArea(), $chart->getXAxisLabel(), $chart->getYAxisLabel(), $chart->getChartAxisX(), $chart->getChartAxisY(), $chart->getMajorGridlines(), $chart->getMinorGridlines());



>         $objWriter->startElement('c:view3D');
>         $surface2D = false;
>         $plotArea = $chart->getPlotArea();
>         if ($plotArea !== null) {
>             $seriesArray = $plotArea->getPlotGroup();
>             foreach ($seriesArray as $series) {
>                 if ($series->getPlotType() === DataSeries::TYPE_SURFACECHART) {
>                     $surface2D = true;
> 
>                     break;
>                 }
>             }
>         }
>         $this->writeView3D($objWriter, $chart->getRotX(), 'c:rotX', $surface2D, 90);
>         $this->writeView3D($objWriter, $chart->getRotY(), 'c:rotY', $surface2D);
>         $this->writeView3D($objWriter, $chart->getRAngAx(), 'c:rAngAx', $surface2D);
>         $this->writeView3D($objWriter, $chart->getPerspective(), 'c:perspective', $surface2D);
>         $objWriter->endElement(); // view3D
> 
>         $this->writePlotArea($objWriter, $chart->getPlotArea(), $chart->getXAxisLabel(), $chart->getYAxisLabel(), $chart->getChartAxisX(), $chart->getChartAxisY());



        $this->writeLegend($objWriter, $chart->getLegend());

        $objWriter->startElement('c:plotVisOnly');

<         $objWriter->writeAttribute('val', (int) $chart->getPlotVisibleOnly());



>         $objWriter->writeAttribute('val', (string) (int) $chart->getPlotVisibleOnly());


        $objWriter->endElement();

        $objWriter->startElement('c:dispBlanksAs');
        $objWriter->writeAttribute('val', $chart->getDisplayBlanksAs());
        $objWriter->endElement();

        $objWriter->startElement('c:showDLblsOverMax');

<         $objWriter->writeAttribute('val', 0);



>         $objWriter->writeAttribute('val', '0');


        $objWriter->endElement();


<         $objWriter->endElement();



>         $objWriter->endElement(); // c:chart
>         if ($chart->getNoFill()) {
>             $objWriter->startElement('c:spPr');
>             $objWriter->startElement('a:noFill');
>             $objWriter->endElement(); // a:noFill
>             $objWriter->endElement(); // c:spPr
>         }



        $this->writePrintSettings($objWriter);


<         $objWriter->endElement();



>         $objWriter->endElement(); // c:chartSpace



        // Return
        return $objWriter->getData();
    }


>     private function writeView3D(XMLWriter $objWriter, ?int $value, string $tag, bool $surface2D, int $default = 0): void
    /**
>     {
     * Write Chart Title.
>         if ($value === null && $surface2D) {
     */
>             $value = $default;
    private function writeTitle(XMLWriter $objWriter, ?Title $title = null): void
>         }
    {
>         if ($value !== null) {
        if ($title === null) {
>             $objWriter->startElement($tag);
            return;
>             $objWriter->writeAttribute('val', "$value");
        }
>             $objWriter->endElement();

>         }
        $objWriter->startElement('c:title');
>     }
        $objWriter->startElement('c:tx');
> 


        $objWriter->startElement('c:rich');

        $objWriter->startElement('a:bodyPr');
        $objWriter->endElement();

        $objWriter->startElement('a:lstStyle');
        $objWriter->endElement();

        $objWriter->startElement('a:p');

>         $objWriter->startElement('a:pPr');

>         $objWriter->startElement('a:defRPr');
        $caption = $title->getCaption();
>         $objWriter->endElement();
        if ((is_array($caption)) && (count($caption) > 0)) {
>         $objWriter->endElement();


            $caption = $caption[0];
        }
        $this->getParentWriter()->getWriterPartstringtable()->writeRichTextForCharts($objWriter, $caption, 'a');

        $objWriter->endElement();
        $objWriter->endElement();
        $objWriter->endElement();

        $this->writeLayout($objWriter, $title->getLayout());

        $objWriter->startElement('c:overlay');

<         $objWriter->writeAttribute('val', 0);



>         $objWriter->writeAttribute('val', '0');


        $objWriter->endElement();

        $objWriter->endElement();
    }

    /**
     * Write Chart Legend.
     */
    private function writeLegend(XMLWriter $objWriter, ?Legend $legend = null): void
    {
        if ($legend === null) {
            return;
        }

        $objWriter->startElement('c:legend');

        $objWriter->startElement('c:legendPos');
        $objWriter->writeAttribute('val', $legend->getPosition());
        $objWriter->endElement();

        $this->writeLayout($objWriter, $legend->getLayout());

        $objWriter->startElement('c:overlay');
        $objWriter->writeAttribute('val', ($legend->getOverlay()) ? '1' : '0');
        $objWriter->endElement();

        $objWriter->startElement('c:txPr');
        $objWriter->startElement('a:bodyPr');
        $objWriter->endElement();

        $objWriter->startElement('a:lstStyle');
        $objWriter->endElement();

        $objWriter->startElement('a:p');
        $objWriter->startElement('a:pPr');

<         $objWriter->writeAttribute('rtl', 0);



>         $objWriter->writeAttribute('rtl', '0');



        $objWriter->startElement('a:defRPr');
        $objWriter->endElement();
        $objWriter->endElement();

        $objWriter->startElement('a:endParaRPr');
        $objWriter->writeAttribute('lang', 'en-US');
        $objWriter->endElement();

        $objWriter->endElement();
        $objWriter->endElement();

        $objWriter->endElement();
    }

    /**
     * Write Chart Plot Area.
     */

<     private function writePlotArea(XMLWriter $objWriter, PlotArea $plotArea, ?Title $xAxisLabel = null, ?Title $yAxisLabel = null, ?Axis $xAxis = null, ?Axis $yAxis = null, ?GridLines $majorGridlines = null, ?GridLines $minorGridlines = null): void



>     private function writePlotArea(XMLWriter $objWriter, ?PlotArea $plotArea, ?Title $xAxisLabel = null, ?Title $yAxisLabel = null, ?Axis $xAxis = null, ?Axis $yAxis = null): void


    {
        if ($plotArea === null) {
            return;
        }


<         $id1 = $id2 = 0;



>         $id1 = $id2 = $id3 = '0';


        $this->seriesIndex = 0;
        $objWriter->startElement('c:plotArea');

        $layout = $plotArea->getLayout();

        $this->writeLayout($objWriter, $layout);

        $chartTypes = self::getChartType($plotArea);
        $catIsMultiLevelSeries = $valIsMultiLevelSeries = false;
        $plotGroupingType = '';
        $chartType = null;
        foreach ($chartTypes as $chartType) {
            $objWriter->startElement('c:' . $chartType);

            $groupCount = $plotArea->getPlotGroupCount();
            $plotGroup = null;
            for ($i = 0; $i < $groupCount; ++$i) {
                $plotGroup = $plotArea->getPlotGroupByIndex($i);
                $groupType = $plotGroup->getPlotType();
                if ($groupType == $chartType) {
                    $plotStyle = $plotGroup->getPlotStyle();

<                     if ($groupType === DataSeries::TYPE_RADARCHART) {



>                     if (!empty($plotStyle) && $groupType === DataSeries::TYPE_RADARCHART) {


                        $objWriter->startElement('c:radarStyle');
                        $objWriter->writeAttribute('val', $plotStyle);
                        $objWriter->endElement();

<                     } elseif ($groupType === DataSeries::TYPE_SCATTERCHART) {



>                     } elseif (!empty($plotStyle) && $groupType === DataSeries::TYPE_SCATTERCHART) {


                        $objWriter->startElement('c:scatterStyle');
                        $objWriter->writeAttribute('val', $plotStyle);
                        $objWriter->endElement();

>                     } elseif ($groupType === DataSeries::TYPE_SURFACECHART_3D || $groupType === DataSeries::TYPE_SURFACECHART) {
                    }
>                         $objWriter->startElement('c:wireframe');

>                         $objWriter->writeAttribute('val', $plotStyle ? '1' : '0');
                    $this->writePlotGroup($plotGroup, $chartType, $objWriter, $catIsMultiLevelSeries, $valIsMultiLevelSeries, $plotGroupingType);
>                         $objWriter->endElement();


                }
            }

            $this->writeDataLabels($objWriter, $layout);

            if ($chartType === DataSeries::TYPE_LINECHART && $plotGroup) {
                //    Line only, Line3D can't be smoothed
                $objWriter->startElement('c:smooth');

<                 $objWriter->writeAttribute('val', (int) $plotGroup->getSmoothLine());



>                 $objWriter->writeAttribute('val', (string) (int) $plotGroup->getSmoothLine());


                $objWriter->endElement();
            } elseif (($chartType === DataSeries::TYPE_BARCHART) || ($chartType === DataSeries::TYPE_BARCHART_3D)) {
                $objWriter->startElement('c:gapWidth');

<                 $objWriter->writeAttribute('val', 150);



>                 $objWriter->writeAttribute('val', '150');


                $objWriter->endElement();

                if ($plotGroupingType == 'percentStacked' || $plotGroupingType == 'stacked') {
                    $objWriter->startElement('c:overlap');

<                     $objWriter->writeAttribute('val', 100);



>                     $objWriter->writeAttribute('val', '100');


                    $objWriter->endElement();
                }
            } elseif ($chartType === DataSeries::TYPE_BUBBLECHART) {

>                 $scale = ($plotGroup === null) ? '' : (string) $plotGroup->getPlotStyle();
                $objWriter->startElement('c:bubbleScale');
>                 if ($scale !== '') {



<                 $objWriter->writeAttribute('val', 25);



>                     $objWriter->writeAttribute('val', $scale);


                $objWriter->endElement();

>                 }



                $objWriter->startElement('c:showNegBubbles');

<                 $objWriter->writeAttribute('val', 0);



>                 $objWriter->writeAttribute('val', '0');


                $objWriter->endElement();
            } elseif ($chartType === DataSeries::TYPE_STOCKCHART) {
                $objWriter->startElement('c:hiLowLines');
                $objWriter->endElement();

                $objWriter->startElement('c:upDownBars');

                $objWriter->startElement('c:gapWidth');

<                 $objWriter->writeAttribute('val', 300);



>                 $objWriter->writeAttribute('val', '300');


                $objWriter->endElement();

                $objWriter->startElement('c:upBars');
                $objWriter->endElement();

                $objWriter->startElement('c:downBars');
                $objWriter->endElement();

                $objWriter->endElement();
            }


<             //    Generate 2 unique numbers to use for axId values
<             $id1 = '75091328';
<             $id2 = '75089408';



>             //    Generate 3 unique numbers to use for axId values
>             $id1 = '110438656';
>             $id2 = '110444544';
>             $id3 = '110365312'; // used in Surface Chart



            if (($chartType !== DataSeries::TYPE_PIECHART) && ($chartType !== DataSeries::TYPE_PIECHART_3D) && ($chartType !== DataSeries::TYPE_DONUTCHART)) {
                $objWriter->startElement('c:axId');
                $objWriter->writeAttribute('val', $id1);
                $objWriter->endElement();
                $objWriter->startElement('c:axId');
                $objWriter->writeAttribute('val', $id2);
                $objWriter->endElement();

>                 if ($chartType === DataSeries::TYPE_SURFACECHART_3D || $chartType === DataSeries::TYPE_SURFACECHART) {
            } else {
>                     $objWriter->startElement('c:axId');
                $objWriter->startElement('c:firstSliceAng');
>                     $objWriter->writeAttribute('val', $id3);
                $objWriter->writeAttribute('val', 0);
>                     $objWriter->endElement();
                $objWriter->endElement();
>                 }



<                 $objWriter->writeAttribute('val', 0);



>                 $objWriter->writeAttribute('val', '0');


                if ($chartType === DataSeries::TYPE_DONUTCHART) {
                    $objWriter->startElement('c:holeSize');

<                     $objWriter->writeAttribute('val', 50);



>                     $objWriter->writeAttribute('val', '50');


                    $objWriter->endElement();
                }
            }

            $objWriter->endElement();
        }

        if (($chartType !== DataSeries::TYPE_PIECHART) && ($chartType !== DataSeries::TYPE_PIECHART_3D) && ($chartType !== DataSeries::TYPE_DONUTCHART)) {
            if ($chartType === DataSeries::TYPE_BUBBLECHART) {

<                 $this->writeValueAxis($objWriter, $xAxisLabel, $chartType, $id1, $id2, $catIsMultiLevelSeries, $xAxis, $majorGridlines, $minorGridlines);



>                 $this->writeValueAxis($objWriter, $xAxisLabel, $chartType, $id2, $id1, $catIsMultiLevelSeries, $xAxis ?? new Axis());


            } else {

<                 $this->writeCategoryAxis($objWriter, $xAxisLabel, $id1, $id2, $catIsMultiLevelSeries, $xAxis);



>                 $this->writeCategoryAxis($objWriter, $xAxisLabel, $id1, $id2, $catIsMultiLevelSeries, $xAxis ?? new Axis());
>             }
> 
>             $this->writeValueAxis($objWriter, $yAxisLabel, $chartType, $id1, $id2, $valIsMultiLevelSeries, $yAxis ?? new Axis());
>             if ($chartType === DataSeries::TYPE_SURFACECHART_3D || $chartType === DataSeries::TYPE_SURFACECHART) {
>                 $this->writeSerAxis($objWriter, $id2, $id3);
>             }
>         }
>         $stops = $plotArea->getGradientFillStops();
>         if ($plotArea->getNoFill() || !empty($stops)) {
>             $objWriter->startElement('c:spPr');
>             if ($plotArea->getNoFill()) {
>                 $objWriter->startElement('a:noFill');
>                 $objWriter->endElement(); // a:noFill
>             }
>             if (!empty($stops)) {
>                 $objWriter->startElement('a:gradFill');
>                 $objWriter->startElement('a:gsLst');
>                 foreach ($stops as $stop) {
>                     $objWriter->startElement('a:gs');
>                     $objWriter->writeAttribute('pos', (string) (Properties::PERCENTAGE_MULTIPLIER * (float) $stop[0]));
>                     $this->writeColor($objWriter, $stop[1], false);
>                     $objWriter->endElement(); // a:gs
>                 }
>                 $objWriter->endElement(); // a:gsLst
>                 $angle = $plotArea->getGradientFillAngle();
>                 if ($angle !== null) {
>                     $objWriter->startElement('a:lin');
>                     $objWriter->writeAttribute('ang', Properties::angleToXml($angle));
>                     $objWriter->endElement(); // a:lin
>                 }
>                 $objWriter->endElement(); // a:gradFill
>             }
>             $objWriter->endElement(); // c:spPr


            }


<             $this->writeValueAxis($objWriter, $yAxisLabel, $chartType, $id1, $id2, $valIsMultiLevelSeries, $yAxis, $majorGridlines, $minorGridlines);



>         $objWriter->endElement(); // c:plotArea


        }


>     private function writeDataLabelsBool(XMLWriter $objWriter, string $name, ?bool $value): void
        $objWriter->endElement();
>     {
    }
>         if ($value !== null) {

>             $objWriter->startElement("c:$name");
    /**
>             $objWriter->writeAttribute('val', $value ? '1' : '0');


     * Write Data Labels.

>     }


     */
    private function writeDataLabels(XMLWriter $objWriter, ?Layout $chartLayout = null): void
    {

>         if (!isset($chartLayout)) {
        $objWriter->startElement('c:dLbls');
>             return;

>         }



<         $objWriter->startElement('c:showLegendKey');
<         $showLegendKey = (empty($chartLayout)) ? 0 : $chartLayout->getShowLegendKey();
<         $objWriter->writeAttribute('val', ((empty($showLegendKey)) ? 0 : 1));
<         $objWriter->endElement();
< 
<         $objWriter->startElement('c:showVal');
<         $showVal = (empty($chartLayout)) ? 0 : $chartLayout->getShowVal();
<         $objWriter->writeAttribute('val', ((empty($showVal)) ? 0 : 1));
<         $objWriter->endElement();



>         $fillColor = $chartLayout->getLabelFillColor();
>         $borderColor = $chartLayout->getLabelBorderColor();
>         if ($fillColor && $fillColor->isUsable()) {
>             $objWriter->startElement('c:spPr');
>             $this->writeColor($objWriter, $fillColor);
>             if ($borderColor && $borderColor->isUsable()) {
>                 $objWriter->startElement('a:ln');
>                 $this->writeColor($objWriter, $borderColor);
>                 $objWriter->endElement(); // a:ln
>             }
>             $objWriter->endElement(); // c:spPr
>         }
>         $fontColor = $chartLayout->getLabelFontColor();
>         if ($fontColor && $fontColor->isUsable()) {
>             $objWriter->startElement('c:txPr');




<         $objWriter->startElement('c:showCatName');
<         $showCatName = (empty($chartLayout)) ? 0 : $chartLayout->getShowCatName();
<         $objWriter->writeAttribute('val', ((empty($showCatName)) ? 0 : 1));
<         $objWriter->endElement();



>             $objWriter->startElement('a:bodyPr');
>             $objWriter->writeAttribute('wrap', 'square');
>             $objWriter->writeAttribute('lIns', '38100');
>             $objWriter->writeAttribute('tIns', '19050');
>             $objWriter->writeAttribute('rIns', '38100');
>             $objWriter->writeAttribute('bIns', '19050');
>             $objWriter->writeAttribute('anchor', 'ctr');
>             $objWriter->startElement('a:spAutoFit');
>             $objWriter->endElement(); // a:spAutoFit
>             $objWriter->endElement(); // a:bodyPr




<         $objWriter->startElement('c:showSerName');
<         $showSerName = (empty($chartLayout)) ? 0 : $chartLayout->getShowSerName();
<         $objWriter->writeAttribute('val', ((empty($showSerName)) ? 0 : 1));
<         $objWriter->endElement();



>             $objWriter->startElement('a:lstStyle');
>             $objWriter->endElement(); // a:lstStyle




<         $objWriter->startElement('c:showPercent');
<         $showPercent = (empty($chartLayout)) ? 0 : $chartLayout->getShowPercent();
<         $objWriter->writeAttribute('val', ((empty($showPercent)) ? 0 : 1));
<         $objWriter->endElement();



>             $objWriter->startElement('a:p');
>             $objWriter->startElement('a:pPr');
>             $objWriter->startElement('a:defRPr');
>             $this->writeColor($objWriter, $fontColor);
>             $objWriter->endElement(); // a:defRPr
>             $objWriter->endElement(); // a:pPr
>             $objWriter->endElement(); // a:p




<         $objWriter->startElement('c:showBubbleSize');
<         $showBubbleSize = (empty($chartLayout)) ? 0 : $chartLayout->getShowBubbleSize();
<         $objWriter->writeAttribute('val', ((empty($showBubbleSize)) ? 0 : 1));
<         $objWriter->endElement();



>             $objWriter->endElement(); // c:txPr
>         }




<         $objWriter->startElement('c:showLeaderLines');
<         $showLeaderLines = (empty($chartLayout)) ? 1 : $chartLayout->getShowLeaderLines();
<         $objWriter->writeAttribute('val', ((empty($showLeaderLines)) ? 0 : 1));
<         $objWriter->endElement();



>         if ($chartLayout->getNumFmtCode() !== '') {
>             $objWriter->startElement('c:numFmt');
>             $objWriter->writeAttribute('formatCode', $chartLayout->getnumFmtCode());
>             $objWriter->writeAttribute('sourceLinked', (string) (int) $chartLayout->getnumFmtLinked());
>             $objWriter->endElement(); // c:numFmt
>         }
>         if ($chartLayout->getDLblPos() !== '') {
>             $objWriter->startElement('c:dLblPos');
>             $objWriter->writeAttribute('val', $chartLayout->getDLblPos());
>             $objWriter->endElement(); // c:dLblPos
>         }
>         $this->writeDataLabelsBool($objWriter, 'showLegendKey', $chartLayout->getShowLegendKey());
>         $this->writeDataLabelsBool($objWriter, 'showVal', $chartLayout->getShowVal());
>         $this->writeDataLabelsBool($objWriter, 'showCatName', $chartLayout->getShowCatName());
>         $this->writeDataLabelsBool($objWriter, 'showSerName', $chartLayout->getShowSerName());
>         $this->writeDataLabelsBool($objWriter, 'showPercent', $chartLayout->getShowPercent());
>         $this->writeDataLabelsBool($objWriter, 'showBubbleSize', $chartLayout->getShowBubbleSize());
>         $this->writeDataLabelsBool($objWriter, 'showLeaderLines', $chartLayout->getShowLeaderLines());




<         $objWriter->endElement();



>         $objWriter->endElement(); // c:dLbls


    }

    /**
     * Write Category Axis.
     *
     * @param string $id1
     * @param string $id2
     * @param bool $isMultiLevelSeries
     */
    private function writeCategoryAxis(XMLWriter $objWriter, ?Title $xAxisLabel, $id1, $id2, $isMultiLevelSeries, Axis $yAxis): void
    {

<         $objWriter->startElement('c:catAx');



>         // N.B. writeCategoryAxis may be invoked with the last parameter($yAxis) using $xAxis for ScatterChart, etc
>         // In that case, xAxis may contain values like the yAxis, or it may be a date axis (LINECHART).
>         $axisType = $yAxis->getAxisType();
>         if ($axisType !== '') {
>             $objWriter->startElement("c:$axisType");
>         } elseif ($yAxis->getAxisIsNumericFormat()) {
>             $objWriter->startElement('c:' . Axis::AXIS_TYPE_VALUE);
>         } else {
>             $objWriter->startElement('c:' . Axis::AXIS_TYPE_CATEGORY);
>         }
>         $majorGridlines = $yAxis->getMajorGridlines();
>         $minorGridlines = $yAxis->getMinorGridlines();




<         if ($id1 > 0) {



>         if ($id1 !== '0') {


            $objWriter->startElement('c:axId');
            $objWriter->writeAttribute('val', $id1);
            $objWriter->endElement();
        }

        $objWriter->startElement('c:scaling');

>         if ($yAxis->getAxisOptionsProperty('maximum') !== null) {
        $objWriter->startElement('c:orientation');
>             $objWriter->startElement('c:max');
        $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('orientation'));
>             $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('maximum'));
        $objWriter->endElement();
>             $objWriter->endElement();
        $objWriter->endElement();
>         }

>         if ($yAxis->getAxisOptionsProperty('minimum') !== null) {
        $objWriter->startElement('c:delete');
>             $objWriter->startElement('c:min');
        $objWriter->writeAttribute('val', 0);
>             $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('minimum'));
        $objWriter->endElement();
>             $objWriter->endElement();

>         }
        $objWriter->startElement('c:axPos');
>         if (!empty($yAxis->getAxisOptionsProperty('orientation'))) {



<         $objWriter->endElement();



>         }
>         $objWriter->endElement(); // c:scaling



<         $objWriter->writeAttribute('val', 0);



>         $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('hidden') ?? '0');




>         if ($majorGridlines !== null) {
        if ($xAxisLabel !== null) {
>             $objWriter->startElement('c:majorGridlines');
            $objWriter->startElement('c:title');
>             $objWriter->startElement('c:spPr');
            $objWriter->startElement('c:tx');
>             $this->writeLineStyles($objWriter, $majorGridlines);
            $objWriter->startElement('c:rich');
>             $this->writeEffects($objWriter, $majorGridlines);

>             $objWriter->endElement(); //end spPr
            $objWriter->startElement('a:bodyPr');
>             $objWriter->endElement(); //end majorGridLines
            $objWriter->endElement();
>         }

> 
            $objWriter->startElement('a:lstStyle');
>         if ($minorGridlines !== null && $minorGridlines->getObjectState()) {
            $objWriter->endElement();
>             $objWriter->startElement('c:minorGridlines');

>             $objWriter->startElement('c:spPr');
            $objWriter->startElement('a:p');
>             $this->writeLineStyles($objWriter, $minorGridlines);
            $objWriter->startElement('a:r');
>             $this->writeEffects($objWriter, $minorGridlines);

>             $objWriter->endElement(); //end spPr
            $caption = $xAxisLabel->getCaption();
>             $objWriter->endElement(); //end minorGridLines
            if (is_array($caption)) {
>         }
                $caption = $caption[0];
> 



<             $objWriter->startElement('a:r');



<             $objWriter->startElement('a:t');
<             $objWriter->writeRawData(StringHelper::controlCharacterPHP2OOXML($caption));
<             $objWriter->endElement();



>             $this->getParentWriter()->getWriterPartstringtable()->writeRichTextForCharts($objWriter, $caption, 'a');



            $objWriter->endElement();
            $objWriter->endElement();
            $objWriter->endElement();

<             $objWriter->endElement();



            $layout = $xAxisLabel->getLayout();
            $this->writeLayout($objWriter, $layout);

            $objWriter->startElement('c:overlay');

<             $objWriter->writeAttribute('val', 0);



>             $objWriter->writeAttribute('val', '0');


            $objWriter->endElement();

            $objWriter->endElement();
        }

        $objWriter->startElement('c:numFmt');
        $objWriter->writeAttribute('formatCode', $yAxis->getAxisNumberFormat());
        $objWriter->writeAttribute('sourceLinked', $yAxis->getAxisNumberSourceLinked());
        $objWriter->endElement();


>         if (!empty($yAxis->getAxisOptionsProperty('major_tick_mark'))) {


        $objWriter->startElement('c:majorTickMark');
        $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('major_tick_mark'));
        $objWriter->endElement();

>         }




>         if (!empty($yAxis->getAxisOptionsProperty('minor_tick_mark'))) {


        $objWriter->startElement('c:minorTickMark');
        $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('minor_tick_mark'));
        $objWriter->endElement();

>         }




>         if (!empty($yAxis->getAxisOptionsProperty('axis_labels'))) {


        $objWriter->startElement('c:tickLblPos');
        $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('axis_labels'));
        $objWriter->endElement();

>         }




<         if ($id2 > 0) {



>         $textRotation = $yAxis->getAxisOptionsProperty('textRotation');
>         if (is_numeric($textRotation)) {
>             $objWriter->startElement('c:txPr');
>             $objWriter->startElement('a:bodyPr');
>             $objWriter->writeAttribute('rot', Properties::angleToXml((float) $textRotation));
>             $objWriter->endElement(); // a:bodyPr
>             $objWriter->startElement('a:lstStyle');
>             $objWriter->endElement(); // a:lstStyle
>             $objWriter->startElement('a:p');
>             $objWriter->startElement('a:pPr');
>             $objWriter->startElement('a:defRPr');
>             $objWriter->endElement(); // a:defRPr
>             $objWriter->endElement(); // a:pPr
>             $objWriter->endElement(); // a:p
>             $objWriter->endElement(); // c:txPr
>         }
> 
>         $objWriter->startElement('c:spPr');
>         $this->writeColor($objWriter, $yAxis->getFillColorObject());
>         $this->writeEffects($objWriter, $yAxis);
>         $objWriter->endElement(); // spPr
> 
>         if ($yAxis->getAxisOptionsProperty('major_unit') !== null) {
>             $objWriter->startElement('c:majorUnit');
>             $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('major_unit'));
>             $objWriter->endElement();
>         }
> 
>         if ($yAxis->getAxisOptionsProperty('minor_unit') !== null) {
>             $objWriter->startElement('c:minorUnit');
>             $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('minor_unit'));
>             $objWriter->endElement();
>         }
> 
>         if ($id2 !== '0') {


            $objWriter->startElement('c:crossAx');
            $objWriter->writeAttribute('val', $id2);
            $objWriter->endElement();


>             if (!empty($yAxis->getAxisOptionsProperty('horizontal_crosses'))) {


            $objWriter->startElement('c:crosses');
            $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('horizontal_crosses'));
            $objWriter->endElement();
        }

>         }



        $objWriter->startElement('c:auto');

<         $objWriter->writeAttribute('val', 1);



>         // LineChart with dateAx wants '0'
>         $objWriter->writeAttribute('val', ($axisType === Axis::AXIS_TYPE_DATE) ? '0' : '1');


        $objWriter->endElement();

        $objWriter->startElement('c:lblAlgn');
        $objWriter->writeAttribute('val', 'ctr');
        $objWriter->endElement();

        $objWriter->startElement('c:lblOffset');

<         $objWriter->writeAttribute('val', 100);



>         $objWriter->writeAttribute('val', '100');


        $objWriter->endElement();


>         if ($axisType === Axis::AXIS_TYPE_DATE) {
        if ($isMultiLevelSeries) {
>             $property = 'baseTimeUnit';
            $objWriter->startElement('c:noMultiLvlLbl');
>             $propertyVal = $yAxis->getAxisOptionsProperty($property);
            $objWriter->writeAttribute('val', 0);
>             if (!empty($propertyVal)) {
            $objWriter->endElement();
>                 $objWriter->startElement("c:$property");
        }
>                 $objWriter->writeAttribute('val', $propertyVal);
        $objWriter->endElement();
>                 $objWriter->endElement();
    }
>             }

>             $property = 'majorTimeUnit';
    /**
>             $propertyVal = $yAxis->getAxisOptionsProperty($property);
     * Write Value Axis.
>             if (!empty($propertyVal)) {
     *
>                 $objWriter->startElement("c:$property");
     * @param null|string $groupType Chart type
>                 $objWriter->writeAttribute('val', $propertyVal);
     * @param string $id1
>                 $objWriter->endElement();
     * @param string $id2
>             }
     * @param bool $isMultiLevelSeries
>             $property = 'minorTimeUnit';
     */
>             $propertyVal = $yAxis->getAxisOptionsProperty($property);
    private function writeValueAxis(XMLWriter $objWriter, ?Title $yAxisLabel, $groupType, $id1, $id2, $isMultiLevelSeries, Axis $xAxis, GridLines $majorGridlines, GridLines $minorGridlines): void
>             if (!empty($propertyVal)) {
    {
>                 $objWriter->startElement("c:$property");
        $objWriter->startElement('c:valAx');
>                 $objWriter->writeAttribute('val', $propertyVal);

>                 $objWriter->endElement();
        if ($id2 > 0) {
>             }
            $objWriter->startElement('c:axId');
>         }
            $objWriter->writeAttribute('val', $id2);
> 



<             $objWriter->writeAttribute('val', 0);



>             $objWriter->writeAttribute('val', '0');



<     private function writeValueAxis(XMLWriter $objWriter, ?Title $yAxisLabel, $groupType, $id1, $id2, $isMultiLevelSeries, Axis $xAxis, GridLines $majorGridlines, GridLines $minorGridlines): void



>     private function writeValueAxis(XMLWriter $objWriter, ?Title $yAxisLabel, $groupType, $id1, $id2, $isMultiLevelSeries, Axis $xAxis): void



<         $objWriter->startElement('c:valAx');



>         $objWriter->startElement('c:' . Axis::AXIS_TYPE_VALUE);
>         $majorGridlines = $xAxis->getMajorGridlines();
>         $minorGridlines = $xAxis->getMinorGridlines();



<         if ($id2 > 0) {



>         if ($id2 !== '0') {



        if ($xAxis->getAxisOptionsProperty('maximum') !== null) {
            $objWriter->startElement('c:max');
            $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('maximum'));
            $objWriter->endElement();
        }

        if ($xAxis->getAxisOptionsProperty('minimum') !== null) {
            $objWriter->startElement('c:min');
            $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('minimum'));
            $objWriter->endElement();
        }


>         if (!empty($xAxis->getAxisOptionsProperty('orientation'))) {


        $objWriter->startElement('c:orientation');
        $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('orientation'));

< 
<         $objWriter->endElement();


        $objWriter->endElement();

>         }

> 
        $objWriter->startElement('c:delete');
>         $objWriter->endElement(); // c:scaling



<         $objWriter->writeAttribute('val', 0);



>         $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('hidden') ?? '0');


        $objWriter->endElement();

        $objWriter->startElement('c:axPos');
        $objWriter->writeAttribute('val', 'l');
        $objWriter->endElement();


>         if ($majorGridlines !== null) {


        $objWriter->startElement('c:majorGridlines');
        $objWriter->startElement('c:spPr');

< 
<         if ($majorGridlines->getLineColorProperty('value') !== null) {
<             $objWriter->startElement('a:ln');
<             $objWriter->writeAttribute('w', $majorGridlines->getLineStyleProperty('width'));
<             $objWriter->startElement('a:solidFill');
<             $objWriter->startElement("a:{$majorGridlines->getLineColorProperty('type')}");
<             $objWriter->writeAttribute('val', $majorGridlines->getLineColorProperty('value'));
<             $objWriter->startElement('a:alpha');
<             $objWriter->writeAttribute('val', $majorGridlines->getLineColorProperty('alpha'));
<             $objWriter->endElement(); //end alpha
<             $objWriter->endElement(); //end srgbClr
<             $objWriter->endElement(); //end solidFill
< 
<             $objWriter->startElement('a:prstDash');
<             $objWriter->writeAttribute('val', $majorGridlines->getLineStyleProperty('dash'));
<             $objWriter->endElement();
< 
<             if ($majorGridlines->getLineStyleProperty('join') == 'miter') {
<                 $objWriter->startElement('a:miter');
<                 $objWriter->writeAttribute('lim', '800000');
<                 $objWriter->endElement();
<             } else {
<                 $objWriter->startElement('a:bevel');
<                 $objWriter->endElement();
<             }
< 
<             if ($majorGridlines->getLineStyleProperty(['arrow', 'head', 'type']) !== null) {
<                 $objWriter->startElement('a:headEnd');
<                 $objWriter->writeAttribute('type', $majorGridlines->getLineStyleProperty(['arrow', 'head', 'type']));
<                 $objWriter->writeAttribute('w', $majorGridlines->getLineStyleArrowParameters('head', 'w'));
<                 $objWriter->writeAttribute('len', $majorGridlines->getLineStyleArrowParameters('head', 'len'));
<                 $objWriter->endElement();
<             }
< 
<             if ($majorGridlines->getLineStyleProperty(['arrow', 'end', 'type']) !== null) {
<                 $objWriter->startElement('a:tailEnd');
<                 $objWriter->writeAttribute('type', $majorGridlines->getLineStyleProperty(['arrow', 'end', 'type']));
<                 $objWriter->writeAttribute('w', $majorGridlines->getLineStyleArrowParameters('end', 'w'));
<                 $objWriter->writeAttribute('len', $majorGridlines->getLineStyleArrowParameters('end', 'len'));
<                 $objWriter->endElement();
<             }
<             $objWriter->endElement(); //end ln
<         }
<         $objWriter->startElement('a:effectLst');
< 
<         if ($majorGridlines->getGlowSize() !== null) {
<             $objWriter->startElement('a:glow');
<             $objWriter->writeAttribute('rad', $majorGridlines->getGlowSize());
<             $objWriter->startElement("a:{$majorGridlines->getGlowColor('type')}");
<             $objWriter->writeAttribute('val', $majorGridlines->getGlowColor('value'));
<             $objWriter->startElement('a:alpha');
<             $objWriter->writeAttribute('val', $majorGridlines->getGlowColor('alpha'));
<             $objWriter->endElement(); //end alpha
<             $objWriter->endElement(); //end schemeClr
<             $objWriter->endElement(); //end glow
<         }
< 
<         if ($majorGridlines->getShadowProperty('presets') !== null) {
<             $objWriter->startElement("a:{$majorGridlines->getShadowProperty('effect')}");
<             if ($majorGridlines->getShadowProperty('blur') !== null) {
<                 $objWriter->writeAttribute('blurRad', $majorGridlines->getShadowProperty('blur'));
<             }
<             if ($majorGridlines->getShadowProperty('distance') !== null) {
<                 $objWriter->writeAttribute('dist', $majorGridlines->getShadowProperty('distance'));
<             }
<             if ($majorGridlines->getShadowProperty('direction') !== null) {
<                 $objWriter->writeAttribute('dir', $majorGridlines->getShadowProperty('direction'));
<             }
<             if ($majorGridlines->getShadowProperty('algn') !== null) {
<                 $objWriter->writeAttribute('algn', $majorGridlines->getShadowProperty('algn'));
<             }
<             if ($majorGridlines->getShadowProperty(['size', 'sx']) !== null) {
<                 $objWriter->writeAttribute('sx', $majorGridlines->getShadowProperty(['size', 'sx']));
<             }
<             if ($majorGridlines->getShadowProperty(['size', 'sy']) !== null) {
<                 $objWriter->writeAttribute('sy', $majorGridlines->getShadowProperty(['size', 'sy']));
<             }
<             if ($majorGridlines->getShadowProperty(['size', 'kx']) !== null) {
<                 $objWriter->writeAttribute('kx', $majorGridlines->getShadowProperty(['size', 'kx']));
<             }
<             if ($majorGridlines->getShadowProperty('rotWithShape') !== null) {
<                 $objWriter->writeAttribute('rotWithShape', $majorGridlines->getShadowProperty('rotWithShape'));
<             }
<             $objWriter->startElement("a:{$majorGridlines->getShadowProperty(['color', 'type'])}");
<             $objWriter->writeAttribute('val', $majorGridlines->getShadowProperty(['color', 'value']));
< 
<             $objWriter->startElement('a:alpha');
<             $objWriter->writeAttribute('val', $majorGridlines->getShadowProperty(['color', 'alpha']));
<             $objWriter->endElement(); //end alpha
< 
<             $objWriter->endElement(); //end color:type
<             $objWriter->endElement(); //end shadow
<         }
< 
<         if ($majorGridlines->getSoftEdgesSize() !== null) {
<             $objWriter->startElement('a:softEdge');
<             $objWriter->writeAttribute('rad', $majorGridlines->getSoftEdgesSize());
<             $objWriter->endElement(); //end softEdge
<         }
< 
<         $objWriter->endElement(); //end effectLst



>             $this->writeLineStyles($objWriter, $majorGridlines);
>             $this->writeEffects($objWriter, $majorGridlines);


        $objWriter->endElement(); //end spPr
        $objWriter->endElement(); //end majorGridLines

>         }




<         if ($minorGridlines->getObjectState()) {



>         if ($minorGridlines !== null && $minorGridlines->getObjectState()) {


            $objWriter->startElement('c:minorGridlines');
            $objWriter->startElement('c:spPr');

< 
<             if ($minorGridlines->getLineColorProperty('value') !== null) {
<                 $objWriter->startElement('a:ln');
<                 $objWriter->writeAttribute('w', $minorGridlines->getLineStyleProperty('width'));
<                 $objWriter->startElement('a:solidFill');
<                 $objWriter->startElement("a:{$minorGridlines->getLineColorProperty('type')}");
<                 $objWriter->writeAttribute('val', $minorGridlines->getLineColorProperty('value'));
<                 $objWriter->startElement('a:alpha');
<                 $objWriter->writeAttribute('val', $minorGridlines->getLineColorProperty('alpha'));
<                 $objWriter->endElement(); //end alpha
<                 $objWriter->endElement(); //end srgbClr
<                 $objWriter->endElement(); //end solidFill
< 
<                 $objWriter->startElement('a:prstDash');
<                 $objWriter->writeAttribute('val', $minorGridlines->getLineStyleProperty('dash'));
<                 $objWriter->endElement();
< 
<                 if ($minorGridlines->getLineStyleProperty('join') == 'miter') {
<                     $objWriter->startElement('a:miter');
<                     $objWriter->writeAttribute('lim', '800000');
<                     $objWriter->endElement();
<                 } else {
<                     $objWriter->startElement('a:bevel');
<                     $objWriter->endElement();
<                 }
< 
<                 if ($minorGridlines->getLineStyleProperty(['arrow', 'head', 'type']) !== null) {
<                     $objWriter->startElement('a:headEnd');
<                     $objWriter->writeAttribute('type', $minorGridlines->getLineStyleProperty(['arrow', 'head', 'type']));
<                     $objWriter->writeAttribute('w', $minorGridlines->getLineStyleArrowParameters('head', 'w'));
<                     $objWriter->writeAttribute('len', $minorGridlines->getLineStyleArrowParameters('head', 'len'));
<                     $objWriter->endElement();
<                 }
< 
<                 if ($minorGridlines->getLineStyleProperty(['arrow', 'end', 'type']) !== null) {
<                     $objWriter->startElement('a:tailEnd');
<                     $objWriter->writeAttribute('type', $minorGridlines->getLineStyleProperty(['arrow', 'end', 'type']));
<                     $objWriter->writeAttribute('w', $minorGridlines->getLineStyleArrowParameters('end', 'w'));
<                     $objWriter->writeAttribute('len', $minorGridlines->getLineStyleArrowParameters('end', 'len'));
<                     $objWriter->endElement();
<                 }
<                 $objWriter->endElement(); //end ln
<             }
< 
<             $objWriter->startElement('a:effectLst');
< 
<             if ($minorGridlines->getGlowSize() !== null) {
<                 $objWriter->startElement('a:glow');
<                 $objWriter->writeAttribute('rad', $minorGridlines->getGlowSize());
<                 $objWriter->startElement("a:{$minorGridlines->getGlowColor('type')}");
<                 $objWriter->writeAttribute('val', $minorGridlines->getGlowColor('value'));
<                 $objWriter->startElement('a:alpha');
<                 $objWriter->writeAttribute('val', $minorGridlines->getGlowColor('alpha'));
<                 $objWriter->endElement(); //end alpha
<                 $objWriter->endElement(); //end schemeClr
<                 $objWriter->endElement(); //end glow
<             }
< 
<             if ($minorGridlines->getShadowProperty('presets') !== null) {
<                 $objWriter->startElement("a:{$minorGridlines->getShadowProperty('effect')}");
<                 if ($minorGridlines->getShadowProperty('blur') !== null) {
<                     $objWriter->writeAttribute('blurRad', $minorGridlines->getShadowProperty('blur'));
<                 }
<                 if ($minorGridlines->getShadowProperty('distance') !== null) {
<                     $objWriter->writeAttribute('dist', $minorGridlines->getShadowProperty('distance'));
<                 }
<                 if ($minorGridlines->getShadowProperty('direction') !== null) {
<                     $objWriter->writeAttribute('dir', $minorGridlines->getShadowProperty('direction'));
<                 }
<                 if ($minorGridlines->getShadowProperty('algn') !== null) {
<                     $objWriter->writeAttribute('algn', $minorGridlines->getShadowProperty('algn'));
<                 }
<                 if ($minorGridlines->getShadowProperty(['size', 'sx']) !== null) {
<                     $objWriter->writeAttribute('sx', $minorGridlines->getShadowProperty(['size', 'sx']));
<                 }
<                 if ($minorGridlines->getShadowProperty(['size', 'sy']) !== null) {
<                     $objWriter->writeAttribute('sy', $minorGridlines->getShadowProperty(['size', 'sy']));
<                 }
<                 if ($minorGridlines->getShadowProperty(['size', 'kx']) !== null) {
<                     $objWriter->writeAttribute('kx', $minorGridlines->getShadowProperty(['size', 'kx']));
<                 }
<                 if ($minorGridlines->getShadowProperty('rotWithShape') !== null) {
<                     $objWriter->writeAttribute('rotWithShape', $minorGridlines->getShadowProperty('rotWithShape'));
<                 }
<                 $objWriter->startElement("a:{$minorGridlines->getShadowProperty(['color', 'type'])}");
<                 $objWriter->writeAttribute('val', $minorGridlines->getShadowProperty(['color', 'value']));
<                 $objWriter->startElement('a:alpha');
<                 $objWriter->writeAttribute('val', $minorGridlines->getShadowProperty(['color', 'alpha']));
<                 $objWriter->endElement(); //end alpha
<                 $objWriter->endElement(); //end color:type
<                 $objWriter->endElement(); //end shadow
<             }
< 
<             if ($minorGridlines->getSoftEdgesSize() !== null) {
<                 $objWriter->startElement('a:softEdge');
<                 $objWriter->writeAttribute('rad', $minorGridlines->getSoftEdgesSize());
<                 $objWriter->endElement(); //end softEdge
<             }
< 
<             $objWriter->endElement(); //end effectLst



>             $this->writeLineStyles($objWriter, $minorGridlines);
>             $this->writeEffects($objWriter, $minorGridlines);


            $objWriter->endElement(); //end spPr
            $objWriter->endElement(); //end minorGridLines
        }

        if ($yAxisLabel !== null) {
            $objWriter->startElement('c:title');
            $objWriter->startElement('c:tx');
            $objWriter->startElement('c:rich');

            $objWriter->startElement('a:bodyPr');
            $objWriter->endElement();

            $objWriter->startElement('a:lstStyle');
            $objWriter->endElement();

            $objWriter->startElement('a:p');

<             $objWriter->startElement('a:r');



            $caption = $yAxisLabel->getCaption();
            if (is_array($caption)) {
                $caption = $caption[0];
            }

< 
<             $objWriter->startElement('a:t');
<             $objWriter->writeRawData(StringHelper::controlCharacterPHP2OOXML($caption));
<             $objWriter->endElement();



>             $this->getParentWriter()->getWriterPartstringtable()->writeRichTextForCharts($objWriter, $caption, 'a');



            $objWriter->endElement();
            $objWriter->endElement();
            $objWriter->endElement();

<             $objWriter->endElement();



            if ($groupType !== DataSeries::TYPE_BUBBLECHART) {
                $layout = $yAxisLabel->getLayout();
                $this->writeLayout($objWriter, $layout);
            }

            $objWriter->startElement('c:overlay');

<             $objWriter->writeAttribute('val', 0);



>             $objWriter->writeAttribute('val', '0');


            $objWriter->endElement();

            $objWriter->endElement();
        }

        $objWriter->startElement('c:numFmt');
        $objWriter->writeAttribute('formatCode', $xAxis->getAxisNumberFormat());
        $objWriter->writeAttribute('sourceLinked', $xAxis->getAxisNumberSourceLinked());
        $objWriter->endElement();


>         if (!empty($xAxis->getAxisOptionsProperty('major_tick_mark'))) {


        $objWriter->startElement('c:majorTickMark');
        $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('major_tick_mark'));
        $objWriter->endElement();

>         }




>         if (!empty($xAxis->getAxisOptionsProperty('minor_tick_mark'))) {


        $objWriter->startElement('c:minorTickMark');
        $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('minor_tick_mark'));
        $objWriter->endElement();

>         }




>         if (!empty($xAxis->getAxisOptionsProperty('axis_labels'))) {


        $objWriter->startElement('c:tickLblPos');
        $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('axis_labels'));
        $objWriter->endElement();

< 
<         $objWriter->startElement('c:spPr');
< 
<         if ($xAxis->getFillProperty('value') !== null) {
<             $objWriter->startElement('a:solidFill');
<             $objWriter->startElement('a:' . $xAxis->getFillProperty('type'));
<             $objWriter->writeAttribute('val', $xAxis->getFillProperty('value'));
<             $objWriter->startElement('a:alpha');
<             $objWriter->writeAttribute('val', $xAxis->getFillProperty('alpha'));
<             $objWriter->endElement();
<             $objWriter->endElement();
<             $objWriter->endElement();


        }


<         $objWriter->startElement('a:ln');
< 
<         $objWriter->writeAttribute('w', $xAxis->getLineStyleProperty('width'));
<         $objWriter->writeAttribute('cap', $xAxis->getLineStyleProperty('cap'));
<         $objWriter->writeAttribute('cmpd', $xAxis->getLineStyleProperty('compound'));
< 
<         if ($xAxis->getLineProperty('value') !== null) {
<             $objWriter->startElement('a:solidFill');
<             $objWriter->startElement('a:' . $xAxis->getLineProperty('type'));
<             $objWriter->writeAttribute('val', $xAxis->getLineProperty('value'));
<             $objWriter->startElement('a:alpha');
<             $objWriter->writeAttribute('val', $xAxis->getLineProperty('alpha'));
<             $objWriter->endElement();
<             $objWriter->endElement();
<             $objWriter->endElement();
<         }
< 
<         $objWriter->startElement('a:prstDash');
<         $objWriter->writeAttribute('val', $xAxis->getLineStyleProperty('dash'));
<         $objWriter->endElement();
< 
<         if ($xAxis->getLineStyleProperty('join') == 'miter') {
<             $objWriter->startElement('a:miter');
<             $objWriter->writeAttribute('lim', '800000');
<             $objWriter->endElement();
<         } else {
<             $objWriter->startElement('a:bevel');
<             $objWriter->endElement();
<         }
< 
<         if ($xAxis->getLineStyleProperty(['arrow', 'head', 'type']) !== null) {
<             $objWriter->startElement('a:headEnd');
<             $objWriter->writeAttribute('type', $xAxis->getLineStyleProperty(['arrow', 'head', 'type']));
<             $objWriter->writeAttribute('w', $xAxis->getLineStyleArrowWidth('head'));
<             $objWriter->writeAttribute('len', $xAxis->getLineStyleArrowLength('head'));
<             $objWriter->endElement();
<         }
< 
<         if ($xAxis->getLineStyleProperty(['arrow', 'end', 'type']) !== null) {
<             $objWriter->startElement('a:tailEnd');
<             $objWriter->writeAttribute('type', $xAxis->getLineStyleProperty(['arrow', 'end', 'type']));
<             $objWriter->writeAttribute('w', $xAxis->getLineStyleArrowWidth('end'));
<             $objWriter->writeAttribute('len', $xAxis->getLineStyleArrowLength('end'));
<             $objWriter->endElement();
<         }
< 
<         $objWriter->endElement();
< 
<         $objWriter->startElement('a:effectLst');
< 
<         if ($xAxis->getGlowProperty('size') !== null) {
<             $objWriter->startElement('a:glow');
<             $objWriter->writeAttribute('rad', $xAxis->getGlowProperty('size'));
<             $objWriter->startElement("a:{$xAxis->getGlowProperty(['color', 'type'])}");
<             $objWriter->writeAttribute('val', $xAxis->getGlowProperty(['color', 'value']));
<             $objWriter->startElement('a:alpha');
<             $objWriter->writeAttribute('val', $xAxis->getGlowProperty(['color', 'alpha']));
<             $objWriter->endElement();
<             $objWriter->endElement();
<             $objWriter->endElement();
<         }
< 
<         if ($xAxis->getShadowProperty('presets') !== null) {
<             $objWriter->startElement("a:{$xAxis->getShadowProperty('effect')}");
< 
<             if ($xAxis->getShadowProperty('blur') !== null) {
<                 $objWriter->writeAttribute('blurRad', $xAxis->getShadowProperty('blur'));
<             }
<             if ($xAxis->getShadowProperty('distance') !== null) {
<                 $objWriter->writeAttribute('dist', $xAxis->getShadowProperty('distance'));
<             }
<             if ($xAxis->getShadowProperty('direction') !== null) {
<                 $objWriter->writeAttribute('dir', $xAxis->getShadowProperty('direction'));
<             }
<             if ($xAxis->getShadowProperty('algn') !== null) {
<                 $objWriter->writeAttribute('algn', $xAxis->getShadowProperty('algn'));
<             }
<             if ($xAxis->getShadowProperty(['size', 'sx']) !== null) {
<                 $objWriter->writeAttribute('sx', $xAxis->getShadowProperty(['size', 'sx']));
<             }
<             if ($xAxis->getShadowProperty(['size', 'sy']) !== null) {
<                 $objWriter->writeAttribute('sy', $xAxis->getShadowProperty(['size', 'sy']));
<             }
<             if ($xAxis->getShadowProperty(['size', 'kx']) !== null) {
<                 $objWriter->writeAttribute('kx', $xAxis->getShadowProperty(['size', 'kx']));
<             }
<             if ($xAxis->getShadowProperty('rotWithShape') !== null) {
<                 $objWriter->writeAttribute('rotWithShape', $xAxis->getShadowProperty('rotWithShape'));
<             }
< 
<             $objWriter->startElement("a:{$xAxis->getShadowProperty(['color', 'type'])}");
<             $objWriter->writeAttribute('val', $xAxis->getShadowProperty(['color', 'value']));
<             $objWriter->startElement('a:alpha');
<             $objWriter->writeAttribute('val', $xAxis->getShadowProperty(['color', 'alpha']));
<             $objWriter->endElement();
<             $objWriter->endElement();
< 
<             $objWriter->endElement();
<         }
< 
<         if ($xAxis->getSoftEdgesSize() !== null) {
<             $objWriter->startElement('a:softEdge');
<             $objWriter->writeAttribute('rad', $xAxis->getSoftEdgesSize());
<             $objWriter->endElement();



>         $textRotation = $xAxis->getAxisOptionsProperty('textRotation');
>         if (is_numeric($textRotation)) {
>             $objWriter->startElement('c:txPr');
>             $objWriter->startElement('a:bodyPr');
>             $objWriter->writeAttribute('rot', Properties::angleToXml((float) $textRotation));
>             $objWriter->endElement(); // a:bodyPr
>             $objWriter->startElement('a:lstStyle');
>             $objWriter->endElement(); // a:lstStyle
>             $objWriter->startElement('a:p');
>             $objWriter->startElement('a:pPr');
>             $objWriter->startElement('a:defRPr');
>             $objWriter->endElement(); // a:defRPr
>             $objWriter->endElement(); // a:pPr
>             $objWriter->endElement(); // a:p
>             $objWriter->endElement(); // c:txPr


        }


<         $objWriter->endElement(); //effectList



>         $objWriter->startElement('c:spPr');
>         $this->writeColor($objWriter, $xAxis->getFillColorObject());
>         $this->writeLineStyles($objWriter, $xAxis);
>         $this->writeEffects($objWriter, $xAxis);


        $objWriter->endElement(); //end spPr


<         if ($id1 > 0) {



>         if ($id1 !== '0') {


            $objWriter->startElement('c:crossAx');

<             $objWriter->writeAttribute('val', $id2);



>             $objWriter->writeAttribute('val', $id1);


            $objWriter->endElement();

            if ($xAxis->getAxisOptionsProperty('horizontal_crosses_value') !== null) {
                $objWriter->startElement('c:crossesAt');
                $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('horizontal_crosses_value'));
                $objWriter->endElement();
            } else {

>                 $crosses = $xAxis->getAxisOptionsProperty('horizontal_crosses');
                $objWriter->startElement('c:crosses');
>                 if ($crosses) {



<                 $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('horizontal_crosses'));



>                     $objWriter->writeAttribute('val', $crosses);


                $objWriter->endElement();
            }

>             }




>             $crossBetween = $xAxis->getCrossBetween();
            $objWriter->startElement('c:crossBetween');
>             if ($crossBetween !== '') {



<             $objWriter->writeAttribute('val', 'midCat');



>                 $objWriter->writeAttribute('val', $crossBetween);


            $objWriter->endElement();

>             }



            if ($xAxis->getAxisOptionsProperty('major_unit') !== null) {
                $objWriter->startElement('c:majorUnit');
                $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('major_unit'));
                $objWriter->endElement();
            }

            if ($xAxis->getAxisOptionsProperty('minor_unit') !== null) {
                $objWriter->startElement('c:minorUnit');
                $objWriter->writeAttribute('val', $xAxis->getAxisOptionsProperty('minor_unit'));
                $objWriter->endElement();
            }
        }

        if ($isMultiLevelSeries) {
            if ($groupType !== DataSeries::TYPE_BUBBLECHART) {
                $objWriter->startElement('c:noMultiLvlLbl');

<                 $objWriter->writeAttribute('val', 0);



>                 $objWriter->writeAttribute('val', '0');


                $objWriter->endElement();
            }
        }

        $objWriter->endElement();
    }

    /**

>      * Write Ser Axis, for Surface chart.
     * Get the data series type(s) for a chart plot series.
>      */
     *
>     private function writeSerAxis(XMLWriter $objWriter, string $id2, string $id3): void
     * @return string[]
>     {
     */
>         $objWriter->startElement('c:serAx');
    private static function getChartType(PlotArea $plotArea): array
> 
    {
>         $objWriter->startElement('c:axId');
        $groupCount = $plotArea->getPlotGroupCount();
>         $objWriter->writeAttribute('val', $id3);

>         $objWriter->endElement(); // axId
        if ($groupCount == 1) {
> 
            $chartType = [$plotArea->getPlotGroupByIndex(0)->getPlotType()];
>         $objWriter->startElement('c:scaling');
        } else {
>         $objWriter->startElement('c:orientation');
            $chartTypes = [];
>         $objWriter->writeAttribute('val', 'minMax');
            for ($i = 0; $i < $groupCount; ++$i) {
>         $objWriter->endElement(); // orientation
                $chartTypes[] = $plotArea->getPlotGroupByIndex($i)->getPlotType();
>         $objWriter->endElement(); // scaling
            }
> 
            $chartType = array_unique($chartTypes);
>         $objWriter->startElement('c:delete');
            if (count($chartTypes) == 0) {
>         $objWriter->writeAttribute('val', '0');
                throw new WriterException('Chart is not yet implemented');
>         $objWriter->endElement(); // delete
            }
> 
        }
>         $objWriter->startElement('c:axPos');

>         $objWriter->writeAttribute('val', 'b');
        return $chartType;
>         $objWriter->endElement(); // axPos
    }
> 

>         $objWriter->startElement('c:majorTickMark');
    /**
>         $objWriter->writeAttribute('val', 'out');
     * Method writing plot series values.
>         $objWriter->endElement(); // majorTickMark
     *
> 
     * @param int $val value for idx (default: 3)
>         $objWriter->startElement('c:minorTickMark');
     * @param string $fillColor hex color (default: FF9900)
>         $objWriter->writeAttribute('val', 'none');
     */
>         $objWriter->endElement(); // minorTickMark
    private function writePlotSeriesValuesElement(XMLWriter $objWriter, $val = 3, $fillColor = 'FF9900'): void
> 
    {
>         $objWriter->startElement('c:tickLblPos');
        $objWriter->startElement('c:dPt');
>         $objWriter->writeAttribute('val', 'nextTo');
        $objWriter->startElement('c:idx');
>         $objWriter->endElement(); // tickLblPos
        $objWriter->writeAttribute('val', $val);
> 
        $objWriter->endElement();
>         $objWriter->startElement('c:crossAx');

>         $objWriter->writeAttribute('val', $id2);
        $objWriter->startElement('c:bubble3D');
>         $objWriter->endElement(); // crossAx
        $objWriter->writeAttribute('val', 0);
> 
        $objWriter->endElement();
>         $objWriter->startElement('c:crosses');

>         $objWriter->writeAttribute('val', 'autoZero');
        $objWriter->startElement('c:spPr');
>         $objWriter->endElement(); // crosses
        $objWriter->startElement('a:solidFill');
> 
        $objWriter->startElement('a:srgbClr');
>         $objWriter->endElement(); //serAx
        $objWriter->writeAttribute('val', $fillColor);
>     }
        $objWriter->endElement();
> 
        $objWriter->endElement();
>     /**



<      *
<      * @param int $val value for idx (default: 3)
<      * @param string $fillColor hex color (default: FF9900)



<     private function writePlotSeriesValuesElement(XMLWriter $objWriter, $val = 3, $fillColor = 'FF9900'): void



>     private function writePlotSeriesValuesElement(XMLWriter $objWriter, int $val, ?ChartColor $fillColor): void


    /**

>         if ($fillColor === null || !$fillColor->isUsable()) {
     * Write Plot Group (series of related plots).
>             return;
     *
>         }



<         $objWriter->startElement('c:idx');
<         $objWriter->writeAttribute('val', $val);
<         $objWriter->endElement();



<         $objWriter->startElement('c:bubble3D');
<         $objWriter->writeAttribute('val', 0);
<         $objWriter->endElement();



>         $objWriter->startElement('c:idx');
>         $objWriter->writeAttribute('val', "$val");
>         $objWriter->endElement(); // c:idx



<         $objWriter->startElement('a:solidFill');
<         $objWriter->startElement('a:srgbClr');
<         $objWriter->writeAttribute('val', $fillColor);
<         $objWriter->endElement();
<         $objWriter->endElement();
<         $objWriter->endElement();
<         $objWriter->endElement();



>         $this->writeColor($objWriter, $fillColor);
>         $objWriter->endElement(); // c:spPr
> 
>         $objWriter->endElement(); // c:dPt



<     private function writePlotGroup(?DataSeries $plotGroup, $groupType, XMLWriter $objWriter, &$catIsMultiLevelSeries, &$valIsMultiLevelSeries, &$plotGroupingType): void



>     private function writePlotGroup(?DataSeries $plotGroup, string $groupType, XMLWriter $objWriter, &$catIsMultiLevelSeries, &$valIsMultiLevelSeries, &$plotGroupingType): void


            $objWriter->endElement();
        }


<         if ($plotGroup->getPlotGrouping() !== null) {


            $plotGroupingType = $plotGroup->getPlotGrouping();

>         if ($plotGroupingType !== null && $groupType !== DataSeries::TYPE_SURFACECHART && $groupType !== DataSeries::TYPE_SURFACECHART_3D) {


            $objWriter->startElement('c:grouping');
            $objWriter->writeAttribute('val', $plotGroupingType);
            $objWriter->endElement();
        }

        //    Get these details before the loop, because we can use the count to check for varyColors
        $plotSeriesOrder = $plotGroup->getPlotOrder();
        $plotSeriesCount = count($plotSeriesOrder);

        if (($groupType !== DataSeries::TYPE_RADARCHART) && ($groupType !== DataSeries::TYPE_STOCKCHART)) {
            if ($groupType !== DataSeries::TYPE_LINECHART) {
                if (($groupType == DataSeries::TYPE_PIECHART) || ($groupType == DataSeries::TYPE_PIECHART_3D) || ($groupType == DataSeries::TYPE_DONUTCHART) || ($plotSeriesCount > 1)) {
                    $objWriter->startElement('c:varyColors');

<                     $objWriter->writeAttribute('val', 1);



>                     $objWriter->writeAttribute('val', '1');


                    $objWriter->endElement();
                } else {
                    $objWriter->startElement('c:varyColors');

<                     $objWriter->writeAttribute('val', 0);



>                     $objWriter->writeAttribute('val', '0');


                    $objWriter->endElement();
                }
            }
        }

        $plotSeriesIdx = 0;
        foreach ($plotSeriesOrder as $plotSeriesIdx => $plotSeriesRef) {
            $objWriter->startElement('c:ser');


<             $plotLabel = $plotGroup->getPlotLabelByIndex($plotSeriesIdx);
<             if ($plotLabel && $groupType !== DataSeries::TYPE_LINECHART) {
<                 $fillColor = $plotLabel->getFillColor();
<                 if ($fillColor !== null && !is_array($fillColor)) {
<                     $objWriter->startElement('c:spPr');
<                     $objWriter->startElement('a:solidFill');
<                     $objWriter->startElement('a:srgbClr');
<                     $objWriter->writeAttribute('val', $fillColor);
<                     $objWriter->endElement();
<                     $objWriter->endElement();
<                     $objWriter->endElement();
<                 }
<             }
< 


            $objWriter->startElement('c:idx');

<             $objWriter->writeAttribute('val', $this->seriesIndex + $plotSeriesIdx);



>             $objWriter->writeAttribute('val', (string) ($this->seriesIndex + $plotSeriesIdx));


            $objWriter->endElement();

            $objWriter->startElement('c:order');

<             $objWriter->writeAttribute('val', $this->seriesIndex + $plotSeriesRef);



>             $objWriter->writeAttribute('val', (string) ($this->seriesIndex + $plotSeriesRef));


            $objWriter->endElement();


>             $plotLabel = $plotGroup->getPlotLabelByIndex($plotSeriesIdx);
            //    Values
>             $labelFill = null;
            $plotSeriesValues = $plotGroup->getPlotValuesByIndex($plotSeriesRef);
>             if ($plotLabel && $groupType === DataSeries::TYPE_LINECHART) {

>                 $labelFill = $plotLabel->getFillColorObject();
            if (($groupType == DataSeries::TYPE_PIECHART) || ($groupType == DataSeries::TYPE_PIECHART_3D) || ($groupType == DataSeries::TYPE_DONUTCHART)) {
>                 $labelFill = ($labelFill instanceof ChartColor) ? $labelFill : null;
                $fillColorValues = $plotSeriesValues->getFillColor();
>             }
                if ($fillColorValues !== null && is_array($fillColorValues)) {
>             if ($plotLabel && $groupType !== DataSeries::TYPE_LINECHART) {
                    foreach ($plotSeriesValues->getDataValues() as $dataKey => $dataValue) {
>                 $fillColor = $plotLabel->getFillColorObject();
                        $this->writePlotSeriesValuesElement($objWriter, $dataKey, ($fillColorValues[$dataKey] ?? 'FF9900'));
>                 if ($fillColor !== null && !is_array($fillColor) && $fillColor->isUsable()) {
                    }
>                     $objWriter->startElement('c:spPr');
                } else {
>                     $this->writeColor($objWriter, $fillColor);
                    $this->writePlotSeriesValuesElement($objWriter);
>                     $objWriter->endElement(); // c:spPr
                }
>                 }
            }
>             }

> 



<             $plotSeriesValues = $plotGroup->getPlotValuesByIndex($plotSeriesRef);



>             $plotSeriesValues = $plotGroup->getPlotValuesByIndex($plotSeriesIdx);



<             if (($groupType == DataSeries::TYPE_PIECHART) || ($groupType == DataSeries::TYPE_PIECHART_3D) || ($groupType == DataSeries::TYPE_DONUTCHART)) {
<                 $fillColorValues = $plotSeriesValues->getFillColor();



>             if ($plotSeriesValues !== false && in_array($groupType, self::CUSTOM_COLOR_TYPES, true)) {
>                 $fillColorValues = $plotSeriesValues->getFillColorObject();



<                         $this->writePlotSeriesValuesElement($objWriter, $dataKey, ($fillColorValues[$dataKey] ?? 'FF9900'));



>                         $this->writePlotSeriesValuesElement($objWriter, $dataKey, $fillColorValues[$dataKey] ?? null);
>                     }



<                 } else {
<                     $this->writePlotSeriesValuesElement($objWriter);


                $objWriter->endElement();

>             if ($plotSeriesValues !== false && $plotSeriesValues->getLabelLayout()) {
                $objWriter->endElement();
>                 $this->writeDataLabels($objWriter, $plotSeriesValues->getLabelLayout());



<             $plotSeriesLabel = $plotGroup->getPlotLabelByIndex($plotSeriesRef);



>             $plotSeriesLabel = $plotGroup->getPlotLabelByIndex($plotSeriesIdx);



            //    Formatting for the points

<             if (($groupType == DataSeries::TYPE_LINECHART) || ($groupType == DataSeries::TYPE_STOCKCHART)) {
<                 $plotLineWidth = 12700;
<                 if ($plotSeriesValues) {
<                     $plotLineWidth = $plotSeriesValues->getLineWidth();
<                 }
< 



>             if (
>                 $plotSeriesValues !== false
>             ) {


                $objWriter->startElement('c:spPr');

>                 $fillObject = $labelFill ?? $plotSeriesValues->getFillColorObject();
                $objWriter->startElement('a:ln');
>                 $callLineStyles = true;
                $objWriter->writeAttribute('w', $plotLineWidth);
>                 if ($fillObject instanceof ChartColor && $fillObject->isUsable()) {
                if ($groupType == DataSeries::TYPE_STOCKCHART) {
>                     if ($groupType === DataSeries::TYPE_LINECHART) {



<                 $objWriter->writeAttribute('w', $plotLineWidth);
<                 if ($groupType == DataSeries::TYPE_STOCKCHART) {
<                     $objWriter->startElement('a:noFill');
<                     $objWriter->endElement();
<                 } elseif ($plotLabel) {
<                     $fillColor = $plotLabel->getFillColor();
<                     if (is_string($fillColor)) {
<                         $objWriter->startElement('a:solidFill');
<                         $objWriter->startElement('a:srgbClr');
<                         $objWriter->writeAttribute('val', $fillColor);
<                         $objWriter->endElement();
<                         $objWriter->endElement();



>                         $callLineStyles = false;


                $objWriter->endElement();

>                     $this->writeColor($objWriter, $fillObject);
                $objWriter->endElement();
>                     if (!$callLineStyles) {
            }
>                         $objWriter->endElement(); // a:ln



<                 $objWriter->endElement();
<                 $objWriter->endElement();



>                 }
>                 $nofill = $groupType === DataSeries::TYPE_STOCKCHART || (($groupType === DataSeries::TYPE_SCATTERCHART || $groupType === DataSeries::TYPE_LINECHART) && !$plotSeriesValues->getScatterLines());
>                 if ($callLineStyles) {
>                     $this->writeLineStyles($objWriter, $plotSeriesValues, $nofill);
>                     $this->writeEffects($objWriter, $plotSeriesValues);
>                 }
>                 $objWriter->endElement(); // c:spPr


                $plotSeriesMarker = $plotSeriesValues->getPointMarker();

<                 if ($plotSeriesMarker) {



>                 $markerFillColor = $plotSeriesValues->getMarkerFillColor();
>                 $fillUsed = $markerFillColor->IsUsable();
>                 $markerBorderColor = $plotSeriesValues->getMarkerBorderColor();
>                 $borderUsed = $markerBorderColor->isUsable();
>                 if ($plotSeriesMarker || $fillUsed || $borderUsed) {


                    $objWriter->startElement('c:marker');
                    $objWriter->startElement('c:symbol');

>                     if ($plotSeriesMarker) {


                    $objWriter->writeAttribute('val', $plotSeriesMarker);

>                     }


                    $objWriter->endElement();

                    if ($plotSeriesMarker !== 'none') {
                        $objWriter->startElement('c:size');

<                         $objWriter->writeAttribute('val', 3);
<                         $objWriter->endElement();



>                         $objWriter->writeAttribute('val', (string) $plotSeriesValues->getPointSize());
>                         $objWriter->endElement(); // c:size
>                         $objWriter->startElement('c:spPr');
>                         $this->writeColor($objWriter, $markerFillColor);
>                         if ($borderUsed) {
>                             $objWriter->startElement('a:ln');
>                             $this->writeColor($objWriter, $markerBorderColor);
>                             $objWriter->endElement(); // a:ln
>                         }
>                         $objWriter->endElement(); // spPr


                    }

                    $objWriter->endElement();
                }
            }

            if (($groupType === DataSeries::TYPE_BARCHART) || ($groupType === DataSeries::TYPE_BARCHART_3D) || ($groupType === DataSeries::TYPE_BUBBLECHART)) {
                $objWriter->startElement('c:invertIfNegative');

<                 $objWriter->writeAttribute('val', 0);



>                 $objWriter->writeAttribute('val', '0');


                $objWriter->endElement();
            }

>             // Trendlines

>             if ($plotSeriesValues !== false) {
            //    Category Labels
>                 foreach ($plotSeriesValues->getTrendLines() as $trendLine) {
            $plotSeriesCategory = $plotGroup->getPlotCategoryByIndex($plotSeriesRef);
>                     $trendLineType = $trendLine->getTrendLineType();
            if ($plotSeriesCategory && ($plotSeriesCategory->getPointCount() > 0)) {
>                     $order = $trendLine->getOrder();
                $catIsMultiLevelSeries = $catIsMultiLevelSeries || $plotSeriesCategory->isMultiLevelSeries();
>                     $period = $trendLine->getPeriod();

>                     $dispRSqr = $trendLine->getDispRSqr();
                if (($groupType == DataSeries::TYPE_PIECHART) || ($groupType == DataSeries::TYPE_PIECHART_3D) || ($groupType == DataSeries::TYPE_DONUTCHART)) {
>                     $dispEq = $trendLine->getDispEq();
                    if ($plotGroup->getPlotStyle() !== null) {
>                     $forward = $trendLine->getForward();
                        $plotStyle = $plotGroup->getPlotStyle();
>                     $backward = $trendLine->getBackward();
                        if ($plotStyle) {
>                     $intercept = $trendLine->getIntercept();
                            $objWriter->startElement('c:explosion');
>                     $name = $trendLine->getName();
                            $objWriter->writeAttribute('val', 25);
>                     $trendLineColor = $trendLine->getLineColor(); // ChartColor
                            $objWriter->endElement();
> 
                        }
>                     $objWriter->startElement('c:trendline'); // N.B. lowercase 'ell'
                    }
>                     if ($name !== '') {
                }
>                         $objWriter->startElement('c:name');

>                         $objWriter->writeRawData($name);
                if (($groupType === DataSeries::TYPE_BUBBLECHART) || ($groupType === DataSeries::TYPE_SCATTERCHART)) {
>                         $objWriter->endElement(); // c:name
                    $objWriter->startElement('c:xVal');
>                     }
                } else {
>                     $objWriter->startElement('c:spPr');
                    $objWriter->startElement('c:cat');
> 
                }
>                     if (!$trendLineColor->isUsable()) {

>                         // use dataSeriesValues line color as a backup if $trendLineColor is null
                $this->writePlotSeriesValues($plotSeriesCategory, $objWriter, $groupType, 'str');
>                         $dsvLineColor = $plotSeriesValues->getLineColor();
                $objWriter->endElement();
>                         if ($dsvLineColor->isUsable()) {
            }
>                             $trendLine

>                                 ->getLineColor()
            //    Values
>                                 ->setColorProperties($dsvLineColor->getValue(), $dsvLineColor->getAlpha(), $dsvLineColor->getType());
            if ($plotSeriesValues) {
>                         }
                $valIsMultiLevelSeries = $valIsMultiLevelSeries || $plotSeriesValues->isMultiLevelSeries();
>                     } // otherwise, hope Excel does the right thing

> 
                if (($groupType === DataSeries::TYPE_BUBBLECHART) || ($groupType === DataSeries::TYPE_SCATTERCHART)) {
>                     $this->writeLineStyles($objWriter, $trendLine, false); // suppress noFill
                    $objWriter->startElement('c:yVal');
> 
                } else {
>                     $objWriter->endElement(); // spPr
                    $objWriter->startElement('c:val');
> 
                }
>                     $objWriter->startElement('c:trendlineType'); // N.B lowercase 'ell'

>                     $objWriter->writeAttribute('val', $trendLineType);
                $this->writePlotSeriesValues($plotSeriesValues, $objWriter, $groupType, 'num');
>                     $objWriter->endElement(); // trendlineType
                $objWriter->endElement();
>                     if ($backward !== 0.0) {
            }
>                         $objWriter->startElement('c:backward');

>                         $objWriter->writeAttribute('val', "$backward");
            if ($groupType === DataSeries::TYPE_BUBBLECHART) {
>                         $objWriter->endElement(); // c:backward
                $this->writeBubbles($plotSeriesValues, $objWriter);
>                     }
            }
>                     if ($forward !== 0.0) {

>                         $objWriter->startElement('c:forward');
            $objWriter->endElement();
>                         $objWriter->writeAttribute('val', "$forward");
        }
>                         $objWriter->endElement(); // c:forward

>                     }
        $this->seriesIndex += $plotSeriesIdx + 1;
>                     if ($intercept !== 0.0) {
    }
>                         $objWriter->startElement('c:intercept');

>                         $objWriter->writeAttribute('val', "$intercept");
    /**
>                         $objWriter->endElement(); // c:intercept
     * Write Plot Series Label.
>                     }
     */
>                     if ($trendLineType == TrendLine::TRENDLINE_POLYNOMIAL) {
    private function writePlotSeriesLabel(?DataSeriesValues $plotSeriesLabel, XMLWriter $objWriter): void
>                         $objWriter->startElement('c:order');
    {
>                         $objWriter->writeAttribute('val', $order);
        if ($plotSeriesLabel === null) {
>                         $objWriter->endElement(); // order
            return;
>                     }
        }
>                     if ($trendLineType == TrendLine::TRENDLINE_MOVING_AVG) {

>                         $objWriter->startElement('c:period');
        $objWriter->startElement('c:f');
>                         $objWriter->writeAttribute('val', $period);
        $objWriter->writeRawData($plotSeriesLabel->getDataSource());
>                         $objWriter->endElement(); // period
        $objWriter->endElement();
>                     }

>                     $objWriter->startElement('c:dispRSqr');
        $objWriter->startElement('c:strCache');
>                     $objWriter->writeAttribute('val', $dispRSqr ? '1' : '0');
        $objWriter->startElement('c:ptCount');
>                     $objWriter->endElement();
        $objWriter->writeAttribute('val', $plotSeriesLabel->getPointCount());
>                     $objWriter->startElement('c:dispEq');
        $objWriter->endElement();
>                     $objWriter->writeAttribute('val', $dispEq ? '1' : '0');

>                     $objWriter->endElement();
        foreach ($plotSeriesLabel->getDataValues() as $plotLabelKey => $plotLabelValue) {
>                     if ($groupType === DataSeries::TYPE_SCATTERCHART || $groupType === DataSeries::TYPE_LINECHART) {
            $objWriter->startElement('c:pt');
>                         $objWriter->startElement('c:trendlineLbl');
            $objWriter->writeAttribute('idx', $plotLabelKey);
>                         $objWriter->startElement('c:numFmt');

>                         $objWriter->writeAttribute('formatCode', 'General');
            $objWriter->startElement('c:v');
>                         $objWriter->writeAttribute('sourceLinked', '0');
            $objWriter->writeRawData($plotLabelValue);
>                         $objWriter->endElement();  // numFmt
            $objWriter->endElement();
>                         $objWriter->endElement();  // trendlineLbl
            $objWriter->endElement();
>                     }
        }
> 
        $objWriter->endElement();
>                     $objWriter->endElement(); // trendline
    }
>                 }

>             }



<             $plotSeriesCategory = $plotGroup->getPlotCategoryByIndex($plotSeriesRef);



>             $plotSeriesCategory = $plotGroup->getPlotCategoryByIndex($plotSeriesIdx);



<                     if ($plotGroup->getPlotStyle() !== null) {



<                         if ($plotStyle) {



>                     if (is_numeric($plotStyle)) {



<                             $objWriter->writeAttribute('val', 25);



>                         $objWriter->writeAttribute('val', $plotStyle);



<                 }


     */

>                 // xVals (Categories) are not always 'str'
    private function writePlotSeriesValues(?DataSeriesValues $plotSeriesValues, XMLWriter $objWriter, $groupType, $dataType = 'str'): void
>                 // Test X-axis Label's Datatype to decide 'str' vs 'num'
    {
>                 $CategoryDatatype = $plotSeriesCategory->getDataType();
        if ($plotSeriesValues === null) {
>                 if ($CategoryDatatype == DataSeriesValues::DATASERIES_TYPE_NUMBER) {
            return;
>                     $this->writePlotSeriesValues($plotSeriesCategory, $objWriter, $groupType, 'num');
        }
>                 } else {




>                 }


        if ($plotSeriesValues->isMultiLevelSeries()) {

>                 if ($groupType === DataSeries::TYPE_SCATTERCHART && $plotGroup->getPlotStyle() === 'smoothMarker') {
            $levelCount = $plotSeriesValues->multiLevelCount();
>                     $objWriter->startElement('c:smooth');

>                     $objWriter->writeAttribute('val', $plotSeriesValues->getSmoothLine() ? '1' : '0');
            $objWriter->startElement('c:multiLvlStrRef');
>                     $objWriter->endElement();

>                 }


            $objWriter->startElement('c:f');

>                 if (!empty($plotGroup->getPlotBubbleSizes()[$plotSeriesIdx])) {
            $objWriter->writeRawData($plotSeriesValues->getDataSource());
>                     $objWriter->startElement('c:bubbleSize');
            $objWriter->endElement();
>                     $this->writePlotSeriesValues(

>                         $plotGroup->getPlotBubbleSizes()[$plotSeriesIdx],
            $objWriter->startElement('c:multiLvlStrCache');
>                         $objWriter,

>                         $groupType,
            $objWriter->startElement('c:ptCount');
>                         'num'
            $objWriter->writeAttribute('val', $plotSeriesValues->getPointCount());
>                     );
            $objWriter->endElement();
>                     $objWriter->endElement();

>                     if ($plotSeriesValues !== false) {
            for ($level = 0; $level < $levelCount; ++$level) {
>                         $objWriter->startElement('c:bubble3D');
                $objWriter->startElement('c:lvl');
>                         $objWriter->writeAttribute('val', $plotSeriesValues->getBubble3D() ? '1' : '0');

>                         $objWriter->endElement();
                foreach ($plotSeriesValues->getDataValues() as $plotSeriesKey => $plotSeriesValue) {
>                     }
                    if (isset($plotSeriesValue[$level])) {
>                 } elseif ($plotSeriesValues !== false) {


                        $objWriter->startElement('c:pt');

>             }



<         $objWriter->writeAttribute('val', $plotSeriesLabel->getPointCount());



>         $objWriter->writeAttribute('val', (string) $plotSeriesLabel->getPointCount());



<             $objWriter->writeAttribute('val', $plotSeriesValues->getPointCount());



>             $objWriter->writeAttribute('val', (string) $plotSeriesValues->getPointCount());


                        $objWriter->startElement('c:v');
                        $objWriter->writeRawData($plotSeriesValue[$level]);
                        $objWriter->endElement();
                        $objWriter->endElement();
                    }
                }

                $objWriter->endElement();
            }

            $objWriter->endElement();

            $objWriter->endElement();
        } else {
            $objWriter->startElement('c:' . $dataType . 'Ref');

            $objWriter->startElement('c:f');
            $objWriter->writeRawData($plotSeriesValues->getDataSource());
            $objWriter->endElement();


>             $count = $plotSeriesValues->getPointCount();
            $objWriter->startElement('c:' . $dataType . 'Cache');
>             $source = $plotSeriesValues->getDataSource();

>             $values = $plotSeriesValues->getDataValues();
            if (($groupType != DataSeries::TYPE_PIECHART) && ($groupType != DataSeries::TYPE_PIECHART_3D) && ($groupType != DataSeries::TYPE_DONUTCHART)) {
>             if ($count > 1 || ($count === 1 && "=$source" !== (string) $values[0])) {


                if (($plotSeriesValues->getFormatCode() !== null) && ($plotSeriesValues->getFormatCode() !== '')) {
                    $objWriter->startElement('c:formatCode');
                    $objWriter->writeRawData($plotSeriesValues->getFormatCode());
                    $objWriter->endElement();
                }
            }

            $objWriter->startElement('c:ptCount');

<             $objWriter->writeAttribute('val', $plotSeriesValues->getPointCount());



>                 $objWriter->writeAttribute('val', (string) $plotSeriesValues->getPointCount());


            $objWriter->endElement();

            $dataValues = $plotSeriesValues->getDataValues();
            if (!empty($dataValues)) {
                if (is_array($dataValues)) {
                    foreach ($dataValues as $plotSeriesKey => $plotSeriesValue) {
                        $objWriter->startElement('c:pt');
                        $objWriter->writeAttribute('idx', $plotSeriesKey);

                        $objWriter->startElement('c:v');
                        $objWriter->writeRawData($plotSeriesValue);
                        $objWriter->endElement();
                        $objWriter->endElement();
                    }
                }
            }


<             $objWriter->endElement();



>                 $objWriter->endElement(); // *Cache
>             }




<             $objWriter->endElement();



>             $objWriter->endElement(); // *Ref


        }
    }


>     private const CUSTOM_COLOR_TYPES = [
    /**
>         DataSeries::TYPE_BARCHART,
     * Write Bubble Chart Details.
>         DataSeries::TYPE_BARCHART_3D,
     */
>         DataSeries::TYPE_PIECHART,
    private function writeBubbles(?DataSeriesValues $plotSeriesValues, XMLWriter $objWriter): void
>         DataSeries::TYPE_PIECHART_3D,
    {
>         DataSeries::TYPE_DONUTCHART,
        if ($plotSeriesValues === null) {
>     ];
            return;
> 


        }

        $objWriter->startElement('c:bubbleSize');
        $objWriter->startElement('c:numLit');

        $objWriter->startElement('c:formatCode');
        $objWriter->writeRawData('General');
        $objWriter->endElement();

        $objWriter->startElement('c:ptCount');

<         $objWriter->writeAttribute('val', $plotSeriesValues->getPointCount());



>         $objWriter->writeAttribute('val', (string) $plotSeriesValues->getPointCount());


        $objWriter->endElement();

        $dataValues = $plotSeriesValues->getDataValues();
        if (!empty($dataValues)) {
            if (is_array($dataValues)) {
                foreach ($dataValues as $plotSeriesKey => $plotSeriesValue) {
                    $objWriter->startElement('c:pt');
                    $objWriter->writeAttribute('idx', $plotSeriesKey);
                    $objWriter->startElement('c:v');

<                     $objWriter->writeRawData(1);



>                     $objWriter->writeRawData('1');


                    $objWriter->endElement();
                    $objWriter->endElement();
                }
            }
        }

        $objWriter->endElement();
        $objWriter->endElement();

        $objWriter->startElement('c:bubble3D');

<         $objWriter->writeAttribute('val', 0);



>         $objWriter->writeAttribute('val', $plotSeriesValues->getBubble3D() ? '1' : '0');


        $objWriter->endElement();
    }

    /**
     * Write Layout.
     */
    private function writeLayout(XMLWriter $objWriter, ?Layout $layout = null): void
    {
        $objWriter->startElement('c:layout');

        if ($layout !== null) {
            $objWriter->startElement('c:manualLayout');

            $layoutTarget = $layout->getLayoutTarget();
            if ($layoutTarget !== null) {
                $objWriter->startElement('c:layoutTarget');
                $objWriter->writeAttribute('val', $layoutTarget);
                $objWriter->endElement();
            }

            $xMode = $layout->getXMode();
            if ($xMode !== null) {
                $objWriter->startElement('c:xMode');
                $objWriter->writeAttribute('val', $xMode);
                $objWriter->endElement();
            }

            $yMode = $layout->getYMode();
            if ($yMode !== null) {
                $objWriter->startElement('c:yMode');
                $objWriter->writeAttribute('val', $yMode);
                $objWriter->endElement();
            }

            $x = $layout->getXPosition();
            if ($x !== null) {
                $objWriter->startElement('c:x');

<                 $objWriter->writeAttribute('val', $x);



>                 $objWriter->writeAttribute('val', "$x");


                $objWriter->endElement();
            }

            $y = $layout->getYPosition();
            if ($y !== null) {
                $objWriter->startElement('c:y');

<                 $objWriter->writeAttribute('val', $y);



>                 $objWriter->writeAttribute('val', "$y");


                $objWriter->endElement();
            }

            $w = $layout->getWidth();
            if ($w !== null) {
                $objWriter->startElement('c:w');

<                 $objWriter->writeAttribute('val', $w);



>                 $objWriter->writeAttribute('val', "$w");


                $objWriter->endElement();
            }

            $h = $layout->getHeight();
            if ($h !== null) {
                $objWriter->startElement('c:h');

<                 $objWriter->writeAttribute('val', $h);



>                 $objWriter->writeAttribute('val', "$h");


                $objWriter->endElement();
            }

            $objWriter->endElement();
        }

        $objWriter->endElement();
    }

    /**
     * Write Alternate Content block.
     */
    private function writeAlternateContent(XMLWriter $objWriter): void
    {
        $objWriter->startElement('mc:AlternateContent');
        $objWriter->writeAttribute('xmlns:mc', 'http://schemas.openxmlformats.org/markup-compatibility/2006');

        $objWriter->startElement('mc:Choice');

<         $objWriter->writeAttribute('xmlns:c14', 'http://schemas.microsoft.com/office/drawing/2007/8/2/chart');


        $objWriter->writeAttribute('Requires', 'c14');

>         $objWriter->writeAttribute('xmlns:c14', 'http://schemas.microsoft.com/office/drawing/2007/8/2/chart');



        $objWriter->startElement('c14:style');
        $objWriter->writeAttribute('val', '102');
        $objWriter->endElement();
        $objWriter->endElement();

        $objWriter->startElement('mc:Fallback');
        $objWriter->startElement('c:style');
        $objWriter->writeAttribute('val', '2');
        $objWriter->endElement();
        $objWriter->endElement();

        $objWriter->endElement();
    }

    /**
     * Write Printer Settings.
     */
    private function writePrintSettings(XMLWriter $objWriter): void
    {
        $objWriter->startElement('c:printSettings');

        $objWriter->startElement('c:headerFooter');
        $objWriter->endElement();

        $objWriter->startElement('c:pageMargins');

<         $objWriter->writeAttribute('footer', 0.3);
<         $objWriter->writeAttribute('header', 0.3);
<         $objWriter->writeAttribute('r', 0.7);
<         $objWriter->writeAttribute('l', 0.7);
<         $objWriter->writeAttribute('t', 0.75);
<         $objWriter->writeAttribute('b', 0.75);



>         $objWriter->writeAttribute('footer', '0.3');
>         $objWriter->writeAttribute('header', '0.3');
>         $objWriter->writeAttribute('r', '0.7');
>         $objWriter->writeAttribute('l', '0.7');
>         $objWriter->writeAttribute('t', '0.75');
>         $objWriter->writeAttribute('b', '0.75');


        $objWriter->endElement();

        $objWriter->startElement('c:pageSetup');
        $objWriter->writeAttribute('orientation', 'portrait');
        $objWriter->endElement();

        $objWriter->endElement();

>     }
    }
> 
}
>     private function writeEffects(XMLWriter $objWriter, Properties $yAxis): void
>     {
>         if (
>             !empty($yAxis->getSoftEdgesSize())
>             || !empty($yAxis->getShadowProperty('effect'))
>             || !empty($yAxis->getGlowProperty('size'))
>         ) {
>             $objWriter->startElement('a:effectLst');
>             $this->writeGlow($objWriter, $yAxis);
>             $this->writeShadow($objWriter, $yAxis);
>             $this->writeSoftEdge($objWriter, $yAxis);
>             $objWriter->endElement(); // effectLst
>         }
>     }
> 
>     private function writeShadow(XMLWriter $objWriter, Properties $xAxis): void
>     {
>         if (empty($xAxis->getShadowProperty('effect'))) {
>             return;
>         }
>         /** @var string */
>         $effect = $xAxis->getShadowProperty('effect');
>         $objWriter->startElement("a:$effect");
> 
>         if (is_numeric($xAxis->getShadowProperty('blur'))) {
>             $objWriter->writeAttribute('blurRad', Properties::pointsToXml((float) $xAxis->getShadowProperty('blur')));
>         }
>         if (is_numeric($xAxis->getShadowProperty('distance'))) {
>             $objWriter->writeAttribute('dist', Properties::pointsToXml((float) $xAxis->getShadowProperty('distance')));
>         }
>         if (is_numeric($xAxis->getShadowProperty('direction'))) {
>             $objWriter->writeAttribute('dir', Properties::angleToXml((float) $xAxis->getShadowProperty('direction')));
>         }
>         $algn = $xAxis->getShadowProperty('algn');
>         if (is_string($algn) && $algn !== '') {
>             $objWriter->writeAttribute('algn', $algn);
>         }
>         foreach (['sx', 'sy'] as $sizeType) {
>             $sizeValue = $xAxis->getShadowProperty(['size', $sizeType]);
>             if (is_numeric($sizeValue)) {
>                 $objWriter->writeAttribute($sizeType, Properties::tenthOfPercentToXml((float) $sizeValue));
>             }
>         }
>         foreach (['kx', 'ky'] as $sizeType) {
>             $sizeValue = $xAxis->getShadowProperty(['size', $sizeType]);
>             if (is_numeric($sizeValue)) {
>                 $objWriter->writeAttribute($sizeType, Properties::angleToXml((float) $sizeValue));
>             }
>         }
>         $rotWithShape = $xAxis->getShadowProperty('rotWithShape');
>         if (is_numeric($rotWithShape)) {
>             $objWriter->writeAttribute('rotWithShape', (string) (int) $rotWithShape);
>         }
> 
>         $this->writeColor($objWriter, $xAxis->getShadowColorObject(), false);
> 
>         $objWriter->endElement();
>     }
> 
>     private function writeGlow(XMLWriter $objWriter, Properties $yAxis): void
>     {
>         $size = $yAxis->getGlowProperty('size');
>         if (empty($size)) {
>             return;
>         }
>         $objWriter->startElement('a:glow');
>         $objWriter->writeAttribute('rad', Properties::pointsToXml((float) $size));
>         $this->writeColor($objWriter, $yAxis->getGlowColorObject(), false);
>         $objWriter->endElement(); // glow
>     }
> 
>     private function writeSoftEdge(XMLWriter $objWriter, Properties $yAxis): void
>     {
>         $softEdgeSize = $yAxis->getSoftEdgesSize();
>         if (empty($softEdgeSize)) {
>             return;
>         }
>         $objWriter->startElement('a:softEdge');
>         $objWriter->writeAttribute('rad', Properties::pointsToXml((float) $softEdgeSize));
>         $objWriter->endElement(); //end softEdge
>     }
> 
>     private function writeLineStyles(XMLWriter $objWriter, Properties $gridlines, bool $noFill = false): void
>     {
>         $objWriter->startElement('a:ln');
>         $widthTemp = $gridlines->getLineStyleProperty('width');
>         if (is_numeric($widthTemp)) {
>             $objWriter->writeAttribute('w', Properties::pointsToXml((float) $widthTemp));
>         }
>         $this->writeNotEmpty($objWriter, 'cap', $gridlines->getLineStyleProperty('cap'));
>         $this->writeNotEmpty($objWriter, 'cmpd', $gridlines->getLineStyleProperty('compound'));
>         if ($noFill) {
>             $objWriter->startElement('a:noFill');
>             $objWriter->endElement();
>         } else {
>             $this->writeColor($objWriter, $gridlines->getLineColor());
>         }
> 
>         $dash = $gridlines->getLineStyleProperty('dash');
>         if (!empty($dash)) {
>             $objWriter->startElement('a:prstDash');
>             $this->writeNotEmpty($objWriter, 'val', $dash);
>             $objWriter->endElement();
>         }
> 
>         if ($gridlines->getLineStyleProperty('join') === 'miter') {
>             $objWriter->startElement('a:miter');
>             $objWriter->writeAttribute('lim', '800000');
>             $objWriter->endElement();
>         } elseif ($gridlines->getLineStyleProperty('join') === 'bevel') {
>             $objWriter->startElement('a:bevel');
>             $objWriter->endElement();
>         }
> 
>         if ($gridlines->getLineStyleProperty(['arrow', 'head', 'type'])) {
>             $objWriter->startElement('a:headEnd');
>             $objWriter->writeAttribute('type', $gridlines->getLineStyleProperty(['arrow', 'head', 'type']));
>             $this->writeNotEmpty($objWriter, 'w', $gridlines->getLineStyleArrowWidth('head'));
>             $this->writeNotEmpty($objWriter, 'len', $gridlines->getLineStyleArrowLength('head'));
>             $objWriter->endElement();
>         }
> 
>         if ($gridlines->getLineStyleProperty(['arrow', 'end', 'type'])) {
>             $objWriter->startElement('a:tailEnd');
>             $objWriter->writeAttribute('type', $gridlines->getLineStyleProperty(['arrow', 'end', 'type']));
>             $this->writeNotEmpty($objWriter, 'w', $gridlines->getLineStyleArrowWidth('end'));
>             $this->writeNotEmpty($objWriter, 'len', $gridlines->getLineStyleArrowLength('end'));
>             $objWriter->endElement();
>         }
>         $objWriter->endElement(); //end ln
>     }
> 
>     private function writeNotEmpty(XMLWriter $objWriter, string $name, ?string $value): void
>     {
>         if ($value !== null && $value !== '') {
>             $objWriter->writeAttribute($name, $value);
>         }
>     }
> 
>     private function writeColor(XMLWriter $objWriter, ChartColor $chartColor, bool $solidFill = true): void
>     {
>         $type = $chartColor->getType();
>         $value = $chartColor->getValue();
>         if (!empty($type) && !empty($value)) {
>             if ($solidFill) {
>                 $objWriter->startElement('a:solidFill');
>             }
>             $objWriter->startElement("a:$type");
>             $objWriter->writeAttribute('val', $value);
>             $alpha = $chartColor->getAlpha();
>             if (is_numeric($alpha)) {
>                 $objWriter->startElement('a:alpha');
>                 $objWriter->writeAttribute('val', ChartColor::alphaToXml((int) $alpha));
>                 $objWriter->endElement(); // a:alpha
>             }
>             $brightness = $chartColor->getBrightness();
>             if (is_numeric($brightness)) {
>                 $brightness = (int) $brightness;
>                 $lumOff = 100 - $brightness;
>                 $objWriter->startElement('a:lumMod');
>                 $objWriter->writeAttribute('val', ChartColor::alphaToXml($brightness));
>                 $objWriter->endElement(); // a:lumMod
>                 $objWriter->startElement('a:lumOff');
>                 $objWriter->writeAttribute('val', ChartColor::alphaToXml($lumOff));
>                 $objWriter->endElement(); // a:lumOff
>             }
>             $objWriter->endElement(); //a:srgbClr/schemeClr/prstClr
>             if ($solidFill) {
>                 $objWriter->endElement(); //a:solidFill
>             }
>         }