docs: def notify(self, msg, color='green', notify='true', message_format='text'):
          """Send notification to specified HipChat room"""
          self.message_dict = {
              'message': msg,
              'color': color,
              'notify': notify,
              'message_format': message_format,
          }
          if not self.debug:
              return requests.post(
                  self.notification_url,
                  json.dumps(self.message_dict),
                  headers=self.headers
              )
          else:
              print('HipChat message: <{}>'.format(msg))
              return []