code: def is_pipeline_stage_at_split():
      """Return true if pipeline stage executes decoder block and next
      stage executes encoder block for a model with both encoder and
      decoder."""
      rank = get_pipeline_model_parallel_rank()
      return is_pipeline_stage_before_split(
          rank
      ) and is_pipeline_stage_after_split(rank + 1)
  
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 26 for calling a global function with example usage: is_pipeline_stage_at_split() and returns: unknown