code: def addStickerToSet(self, user_id, name, png_sticker, emojis,
                          mask_position=None):
          
          p = _strip(locals(), more=['png_sticker'])
          return self._api_request_with_file('addStickerToSet', _rectify(p), 'png_sticker', png_sticker)
docs: See: https://core.telegram.org/bots/api#addstickertoset