def get_subgraph_list(self):
        """Get the list of Subgraph instances.

        This method returns the list of Subgraph instances
        in the graph.
        """

        sgraph_objs = list()

        for sgraph in self.obj_dict['subgraphs']:
                obj_dict_list = self.obj_dict['subgraphs'][sgraph]
                sgraph_objs.extend(
                    [Subgraph(obj_dict=obj_d)
                     for obj_d in obj_dict_list])

        return sgraph_objs
Get the list of Subgraph instances.

        This method returns the list of Subgraph instances
        in the graph.