code: def passthrough(module, grad_input, grad_output):
      """No change made to gradients"""
      return None
  
file_path: shap/shap/explainers/_deep/deep_pytorch.py
imports: import warnings
  import numpy
  from packaging import version
  from .._explainer import Explainer
  from .deep_utils import _check_additivity
label_desc: Use image node_id 4 for calling a global function with example usage: passthrough(module, grad_input, grad_output) and returns: None