old_contents: """A shared value without deep copy."""
  
  
  class SharedValue(object):
    """A shared value without deep copy."""
  
    def __init__(self, value):
      self.value = value
  
    def __deepcopy__(self, memo):
      return SharedValue(self.value)
  
new_contents: # Copyright 2022 DeepMind Technologies Limited
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """A shared value without deep copy."""
  
  
  class SharedValue(object):
    """A shared value without deep copy."""
  
    def __init__(self, value):
      self.value = value
  
    def __deepcopy__(self, memo):
      return SharedValue(self.value)
  
subject: Add license header to shared_value.py.