code: def prev_widen(self, indices, magnifier, noise=None):
      assert self._init is not None, "Uninitialized layer"
      # rescale W
      self._init["W"] = self._init["W"][indices] * magnifier.reshape(
          [-1, 1]
      )
      if self.pre_activation:
          self.widen_bn(indices, magnifier, noise=noise)
  
imports: from models.basic_model import BasicModel
  import tensorflow
  import numpy
  import copy
label_desc: Use image node_id 8 for calling the FCLayer obj's underlying member method code with example usage: obj.prev_widen(indices, magnifier, noise) without return types