code: def identity_function(X: Any) -> Any:
      """
      Identity function.
  
      Parameters
      ----------
      X
          Input instance.
  
      Returns
      -------
      X
          The input instance.
      """
      return X
  
file_path: alibi/alibi/explainers/backends/cfrl_base.py
imports: import numpy
  from typing import Callable, Any, Optional
  from abc import ABC, abstractmethod
label_desc: Use image node_id 1 for calling a global function with example usage: identity_function(X) and returns: X