code: def result(self, timeout=None):
          
          if self.done:
              return self._result
  
          result = self.conn.process_packets(transaction_id=self.transaction_id,
                                             timeout=timeout)
  
          self._result = result
          self.done = True
  
          return result
docs: Retrieves the result of the call.
  
          :param timeout: The time to wait for a result from the server.
  
          Raises :exc:`RTMPTimeoutError` on timeout.