code: def prev_widen(self, indices, magnifier, noise=None):
      for layer in self.layers:
          if isinstance(layer, ConvLayer) or isinstance(layer, FCLayer):
              layer.prev_widen(indices, magnifier, noise=noise)
              break
          else:
              layer.prev_widen(indices, magnifier, noise=noise)
  
file_path: auptimizer/Examples/cai_eas/eas/models/layer_cascade.py
imports: from models.layers import ConvLayer, FCLayer, PoolLayer, get_layer_by_name
  import tensorflow
label_desc: Use image node_id 12 for calling the LayerCascade obj's underlying member method code with example usage: obj.prev_widen(indices, magnifier, noise) without return types