* @method string getSticker() The added sticker. Pass a file_id as a String to send a file that already exists on the Telegram servers, pass an HTTP URL as a String for Telegram to get a file from the Internet, upload a new one using multipart/form-data, or pass “attach://<file_attach_name>” to upload a new one using multipart/form-data under <file_attach_name> name. Animated and video stickers can't be uploaded via HTTP URL. More information on Sending Files »
* @method string[] getEmojiList() List of 1-20 emoji associated with the sticker
* @method MaskPosition getMaskPosition() Optional. Position where the mask should be placed on faces. For “mask” stickers only.
* @method string[] getKeywords() Optional. List of 0-20 search keywords for the sticker with total length of up to 64 characters. For “regular” and “custom_emoji” stickers only.
* @method string getFormat() Format of the sticker, must be one of “static”, “animated”, “video”