class_docstr: An abstract base class for generating synthetic graphs.
docstr: To be implemented by :class:`GraphGenerator` subclasses.
docstr_tok: ["To","be","implemented","by",":","class",":","`","GraphGenerator","`","subclasses","."]
code: def __call__(self) -> Data:
      r"""To be implemented by :class:`GraphGenerator` subclasses."""
      raise NotImplementedError
  
file_path: pytorch_geometric/torch_geometric/datasets/graph_generator/base.py
imports: from abc import ABC, abstractmethod
  from typing import Any
  from torch_geometric.data import Data
  from torch_geometric.resolver import resolver
label_desc: Use image node_id 1 for calling the GraphGenerator obj's underlying member method code with example usage: obj.__call__() without return types