code: def send_msg(self, text, channel, confirm=True):
          
  
          self._send_id += 1
          msg = SlackMsg(self._send_id, channel.id, text)
          self.ws.send(msg.json)
          self._stats['messages_sent'] += 1
  
          if confirm:
              # Wait for confirmation our message was received
              for e in self.events():
                  if e.get('reply_to') == self._send_id:
                      msg.sent = True
                      msg.ts = e.ts
                      return msg
          else:
              return msg
docs: Send a message to a channel or group via Slack RTM socket, returning
          the resulting message object
  
          params:
           - text(str): Message text to send
           - channel(Channel): Target channel
           - confirm(bool): If True, wait for a reply-to confirmation before returning.