code: def t_name(key):
      """Rename the feature keys so that they don't clash with the raw keys when.
  
      running the Evaluator component.
      Args:
        key: The original feature key
  
      Returns:
        key with '_xf' appended
      """
      return key + "_xf"
  
imports: from typing import List
  import absl
  from keras.callbacks import LambdaCallback
  import tensorflow
  import tensorflow_transform
  from tfx.components.trainer.executor import TrainerFnArgs
  from tfx.components.trainer.fn_args_utils import DataAccessor
  from tfx_bsl.tfxio import dataset_options
label_desc: Use image node_id 1 for calling a global function with example usage: t_name(key) and returns: unknown