(self)
Close the loop.

        The loop should not be running.

        This is idempotent and irreversible.

        No other methods should be called after this one.
Close the loop.
Close the loop .
def close(self):
        """Close the loop.

        The loop should not be running.

        This is idempotent and irreversible.

        No other methods should be called after this one.
        """
        raise NotImplementedError
def close ( self ) : raise NotImplementedError