old_contents: #
  # Copyright 2016 The BigDL Authors.
  #
  # 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.
  #
  
  import functools
  from bigdl.nano.utils.log4Error import invalidInputError
  
  
  def proxy_method(cls, name):
      # This unbound method will be pulled from the superclass.
      invalidInputError(hasattr(cls, name),
                        "cls should have name attribute")
      proxyed = getattr(cls, name)
  
      @functools.wraps(proxyed)
      def wrapper(self, *args, **kwargs):
          return self._proxy(name, proxyed.__get__(self, cls), *args, **kwargs)
      return wrapper
  
  
  def proxy_methods(cls):
      for name in cls.PROXYED_METHODS:
          setattr(cls, name, proxy_method(cls, name))
      return cls
  
new_contents: #
  # Copyright 2016 The BigDL Authors.
  #
  # 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.
  #
  
  import functools
  from bigdl.nano.utils.log4Error import invalidInputError
  
  
  def proxy_method(cls, name):
      # This unbound method will be pulled from the superclass.
      invalidInputError(hasattr(cls, name),
                        f"%s should have %s attribute" %
                        (str(cls.__name__), name))
      proxyed = getattr(cls, name)
  
      @functools.wraps(proxyed)
      def wrapper(self, *args, **kwargs):
          return self._proxy(name, proxyed.__get__(self, cls), *args, **kwargs)
      return wrapper
  
  
  def proxy_methods(cls):
      for name in cls.PROXYED_METHODS:
          if hasattr(cls, name):
              setattr(cls, name, proxy_method(cls, name))
      return cls
  
subject: fix proxy for tf version compatibility (#5006)