code: def identity(x):
      """
      this is used together with partial to replace a lambda function
      that causes pickle to fail
      """
      return x
  
imports: from collections import defaultdict
  from functools import partial
  from typing import Any, Dict, List, Mapping, Optional, Tuple, Union, Callable, Sequence
  from typing_extensions import Protocol
  from avalanche.benchmarks.utils.transforms import MultiParamCompose, TupleTransform, MultiParamTransform
label_desc: Use image node_id 1 for calling a global function with example usage: identity(x) and returns: x