* @method string getFileId() Identifier for this file, which can be used to download or reuse the file
* @method string getFileUniqueId() Unique identifier for this file, which is supposed to be the same over time and for different bots. Can't be used to download or reuse the file.
* @method PhotoSize getThumbnail() Optional. Document thumbnail as defined by sender
* @method string getFileName() Optional. Original filename as defined by sender
* @method string getMimeType() Optional. MIME type of the file as defined by sender