def __init__(self, unknown_method_name):
    """Init exception.

    Args:
      # unknown_method_name: Method call that is not part of the mocked class's
      #   public interface.
      unknown_method_name: str
    """

    Error.__init__(self)
    self._unknown_method_name = unknown_method_name
Init exception.

    Args:
      # unknown_method_name: Method call that is not part of the mocked class's
      #   public interface.
      unknown_method_name: str
    
deps/protobuf/python/mox.py