code: def get_pipeline_model_parallel_group():
      """Get the pipeline model parallel group the caller rank belongs to."""
      assert (
          _PIPELINE_MODEL_PARALLEL_GROUP is not None
      ), "pipeline_model parallel group is not initialized"
      return _PIPELINE_MODEL_PARALLEL_GROUP
  
imports: from typing import Tuple, Optional
  import warnings
  import os
  import torch
  from apex.transformer.log_util import get_transformer_logger
  from apex.transformer._ucc_util import HAS_UCC
label_desc: Use image node_id 13 for calling a global function with example usage: get_pipeline_model_parallel_group() and returns: _PIPELINE_MODEL_PARALLEL_GROUP