code: def get_data_parallel_group():
      """Get the data parallel group the caller rank belongs to."""
      assert (
          _DATA_PARALLEL_GROUP is not None
      ), "data parallel group is not initialized"
      return _DATA_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 14 for calling a global function with example usage: get_data_parallel_group() and returns: _DATA_PARALLEL_GROUP