message: Making a copy of config in from_config
  Fixes
diff: @@ -82,6 +82,8 @@ class Wrapper(Layer):
  @classmethod
  def from_config(cls, config, custom_objects=None):
  from tensorflow.python.keras.layers import deserialize as deserialize_layer # pylint: disable=g-import-not-at-top
  + # Avoid mutating the input dict
  + config = config.copy()
  layer = deserialize_layer(
  config.pop('layer'), custom_objects=custom_objects)
  return cls(layer, **config)
  