code: def __call__(self, generator):
      self.generator = generator
  
      ego_generator = self.base_ego_generator
      ego_generator = AsynchronousGenerator(ego_generator, maxsize=1000)
  
      for data in ego_generator():
          yield data
  
imports: import os
  import re
  import sys
  import time
  import warnings
  import numpy
  from collections import defaultdict
  import pgl
  from pgl.utils.logger import log
  from pgl.distributed import DistGraphClient, DistGraphServer
  from utils.config import prepare_config
  from datasets.helper import stream_shuffle_generator, AsynchronousGenerator
  from datasets.node import NodeGenerator
  import datasets.sampling
label_desc: Use image node_id 2 for calling the EgoGraphGenerator obj's underlying member method code with example usage: obj.__call__(generator) without return types