code: def _identity_preprocessing_fn(inputs):
      return inputs.copy()
  
file_path: transform/tensorflow_transform/inspect_preprocessing_fn_test.py
imports: import tensorflow
  from tensorflow_transform import analyzers
  from tensorflow_transform import inspect_preprocessing_fn
  from tensorflow_transform import mappers
  from tensorflow_transform import test_case
label_desc: Use image node_id 1 for calling a global function with example usage: _identity_preprocessing_fn(inputs) and returns: inputs