(self, parent_message, field)
Args:
      parent_message: The message whose _Modified() method we should call when
        we receive Modified() messages.
      field: The descriptor of the field being set in the parent message.
Args:
      parent_message: The message whose _Modified() method we should call when
        we receive Modified() messages.
      field: The descriptor of the field being set in the parent message.
Args : parent_message : The message whose _Modified () method we should call when we receive Modified () messages . field : The descriptor of the field being set in the parent message .
def __init__(self, parent_message, field):
    """Args:
      parent_message: The message whose _Modified() method we should call when
        we receive Modified() messages.
      field: The descriptor of the field being set in the parent message.
    """
    super(_OneofListener, self).__init__(parent_message)
    self._field = field
def __init__ ( self , parent_message , field ) : super ( _OneofListener , self ) . __init__ ( parent_message ) self . _field = field