public function parsePhotoSize($photoSizeObject) { $photoSize = new PhotoSize(); $photoSize->setFileId($photoSizeObject->file_id); $photoSize->setWidth($photoSizeObject->width); $photoSize->setHeight($photoSizeObject->height); if (property_exists($photoSizeObject, 'file_size')) { $photoSize->setFileSize($photoSizeObject->file_size); } return $photoSize; }