RestService::getDocumentId

static function getDocumentId($documentId): ?array
{
	$documentId = CBPHelper::parseDocumentId($documentId);
	$documentService = CBPRuntime::getRuntime(true)->getDocumentService();
	$documentId = $documentService->normalizeDocumentId($documentId);

	if (!$documentService->getDocument($documentId))
	{
		return null;
	}

	return $documentId;
}