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<?php namespace PhpOffice\PhpSpreadsheet\Collection; use PhpOffice\PhpSpreadsheet\Settings; use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet; abstract class CellsFactory { /** * Initialise the cache storage. *< * @param Worksheet $parent Enable cell caching for this worksheet> * @param Worksheet $worksheet Enable cell caching for this worksheet*< * @return Cells* */< public static function getInstance(Worksheet $parent)> public static function getInstance(Worksheet $worksheet): Cells{< return new Cells($parent, Settings::getCache());> return new Cells($worksheet, Settings::getCache());} }