<?php namespace Packback\Lti1p3\Interfaces;> /** @internal */interface IServiceRequest { public function getMethod(): string; public function getUrl(): string; public function getPayload(): array; public function setUrl(string $url): self; public function setAccessToken(string $accessToken): self; public function setBody(string $body): self; public function setAccept(string $accept): self; public function setContentType(string $contentType): self;> } > public function getErrorPrefix(): string;