Section::checkFieldsList

public function checkFieldsList($arguments): Result
{
	$r = new Result();

	$error=[];

	if(count($error)>0)
		$r->addError(new Error('Required select fields: '.implode(', ', $error)));

	if(!isset($arguments['filter']['IBLOCK_ID']))
		$r->addError(new Error('Required filter fields: iblockId'));

	return $r;
}