code: def advertise_endpoint(self, endpoint_description):
          
          endpoint_id = endpoint_description.get_id()
          with self._published_endpoints_lock:
              if self.get_advertised_endpoint(endpoint_id) is not None:
                  return False
  
              advertise_result = self._advertise(endpoint_description)
              if advertise_result:
                  self._add_advertised(endpoint_description, advertise_result)
                  return True
  
              return False
docs: Advertise and endpoint_description for remote discovery.
          If it hasn't already been a endpoint_description will be advertised via
          a some protocol.
  
          :param endpoint_description: an instance of EndpointDescription to
          advertise. Must not be None.
          :return: True if advertised, False if not
          (e.g. it's already been advertised)