docs: def enable_receiving(self, loop=None):
          """Schedules the receive loop to run on the given loop."""
          self.receive_task = asyncio.ensure_future(self._receive_loop(), loop=loop)
  
          def do_if_done(fut):
              try:
                  fut.result()
              except asyncio.CancelledError:
                  pass
              except Exception as ex:
                  self.receive_task_exception = ex
              self.receive_task = None
  
          self.receive_task.add_done_callback(do_if_done)