code: def getBackendName(self):
      return "mock_process_group"
  
file_path: pytorch/torch/testing/_internal/distributed/distributed_utils.py
imports: from contextlib import contextmanager
  from datetime import timedelta
  from functools import partial, wraps
  import torch.distributed
  import torch.distributed.distributed_c10d
label_desc: Use image node_id 2 for calling the MockProcessGroup obj's underlying member method code with example usage: obj.getBackendName() and returns: str