old_contents: """Errors module."""
  
  
  class Error(Exception):
      """Base error.
  
      All dependency injector errors extend this error class.
      """
  
  
  class UndefinedProviderError(Error, AttributeError):
      """Undefined provider error.
  
      This error is used when provider could not be defined, for example:
  
          - provider with certain name could not be defined
          - catalog's name of the certain provider could not be defined
          - etc...
  
      Also this error extends standard :py:class:`AttributeError`. This gives
      possibility to use it correctly with ``__getattr__()``.
      """
  
new_contents: """Errors module."""
  
  
  class Error(Exception):
      """Base error.
  
      All dependency injector errors extend this error class.
      """
  
subject: Remove UndefinedProviderError