getBusinessConnection(businessConnectionId, form = {}) {
    form.business_connection_id = businessConnectionId;
    return this._request('getBusinessConnection', { form });
  }
Use this method to get information about the connection of the bot with a business account

@param {Number|String} businessConnectionId  Unique identifier for the group/channel
@param {Object} [options] Additional Telegram query options
@return {Promise} On success, returns [BusinessConnection](https://core.telegram.org/bots/api#businessconnection) object
@see https://core.telegram.org/bots/api#getbusinessconnection