code: async def sendto(self, data, component):
          
          active_pair = self._nominated.get(component)
          if active_pair:
              await active_pair.protocol.send_data(data, active_pair.remote_addr)
          else:
              raise ConnectionError('Cannot send data, not connected')
docs: Send a datagram on the specified component.
  
          If the connection is not established, a `ConnectionError` is raised.