code: def _run(self, peer):
          
          # We know the peer we are connected to, we send open message.
          self._peer = peer
          self.connection_made()
  
          # We wait for peer to send messages.
          self._recv_loop()
docs: Sends open message to peer and handles received messages.
  
          Parameters:
              - `peer`: the peer to which this protocol instance is connected to.