code: def get_model_parallel_group():
      """Get the model parallel group the caller rank belongs to."""
      assert (
          _MODEL_PARALLEL_GROUP is not None
      ), "model parallel group is not initialized"
      return _MODEL_PARALLEL_GROUP
  
imports: import os
  from typing import Optional
  import torch
  from .utils import GlobalMemoryBuffer
label_desc: Use image node_id 5 for calling a global function with example usage: get_model_parallel_group() and returns: _MODEL_PARALLEL_GROUP