public function getUnsupportedSortErrorObject($genericTitle=null, $specificDetails=null) {
		$errorObject = new ErrorObject('Unsupported sort');
		$errorObject->appendTypeLink('https://jsonapi.org/profiles/ethanresnick/cursor-pagination/unsupported-sort');
		$errorObject->blameQueryParameter('sort');
		$errorObject->setHttpStatusCode(400);
		
		if ($genericTitle !== null) {
			$errorObject->setHumanExplanation($genericTitle, $specificDetails);
		}
		
		return $errorObject;
	}