stopPoll(chatId, pollId, form = {}) {
    form.chat_id = chatId;
    form.message_id = pollId;
    return this._request('stopPoll', { form });
  }
Use this method to stop a poll which was sent by the bot.

@param {Number|String} chatId  Unique identifier for the group/channel
@param {Number} pollId Identifier of the original message with the poll
@param {Object} [options] Additional Telegram query options
@return {Promise} On success, the stopped [Poll](https://core.telegram.org/bots/api#poll) is returned
@see https://core.telegram.org/bots/api#stoppoll