code: def serialize(self):
          '''
          Return a JSON string of the serialized topology
          '''
          return json.dumps(json_graph.node_link_data(self.__nxgraph), cls=Encoderf serialize(self):
          '''
          Return a JSON string of the serialized topology
          '''
          return json.dumps(json_graph.node_link_data(self.__nxgraph), cls=Encoder)
docs: Return a JSON string of the serialized topology