restrictChatMember(chatId, userId, form = {}) {
    form.chat_id = chatId;
    form.user_id = userId;
    return this._request('restrictChatMember', { form });
  }
Use this method to restrict a user in a supergroup.
The bot **must be an administrator in the supergroup** for this to work
and must have the appropriate admin rights. Pass True for all boolean parameters
to lift restrictions from a user. Returns True on success.

@param {Number|String} chatId  Unique identifier for the target chat or username of the target channel (in the format `@channelusername`)
@param {Number} userId Unique identifier of the target user
@param {Object} [options] Additional Telegram query options
@return {Promise} True on success
@see https://core.telegram.org/bots/api#restrictchatmember