code: def how(request):
      return request.param
  
file_path: distributed/distributed/shuffle/tests/test_merge_column_and_index.py
imports: from __future__ import annotations
  import pytest
  import pandas
  import dask
  from dask.dataframe.utils import assert_eq
  from distributed.shuffle import HashJoinP2PLayer, P2PShuffleLayer
  from distributed.utils_test import gen_cluster
label_desc: Use image node_id 11 for calling a global function with example usage: how(request) and returns: request