code: def default_overrides():
      return gradient_override_map(default_overrides_map)
  
file_path: lucid/lucid/optvis/overrides/__init__.py
imports: from lucid.optvis.overrides.gradient_override import gradient_override_map, use_gradient
  from lucid.optvis.overrides.identity_grad import identity_grad
  from lucid.optvis.overrides.redirected_relu_grad import redirected_relu_grad, redirected_relu6_grad
  from lucid.optvis.overrides.smoothed_maxpool_grad import avg_smoothed_maxpool_grad
label_desc: Use image node_id 3 for calling a global function with example usage: default_overrides() and returns: gradient_override_map