code: def prev_widen(self, indices, magnifier, noise=None):
      super(TransitionBlock, self).prev_widen(
          indices, magnifier, noise=noise
      )
      return False, None, None
  
imports: import tensorflow
  from .basic_model import BasicModel
  from .layers import ConvLayer, FCLayer, PoolLayer, get_magnifier, apply_noise
  from ..data_providers.base_provider import DataProvider
  from .layer_cascade import LayerCascade
  from .layer_multi_branch import LayerMultiBranch
  import numpy
label_desc: Use image node_id 3 for calling the TransitionBlock obj's underlying member method code with example usage: obj.prev_widen(indices, magnifier, noise) and returns: False,  None,  None