code: def nl(request):
      return request.param
  
file_path: gluonts/test/test_json.py
imports: from io import StringIO, BytesIO
  import pytest
  from gluonts.json import _orjson, _ujson, _json
label_desc: Use image node_id 2 for calling a global function with example usage: nl(request) and returns: request