'If a child waker was created and installed, uninstall it now.
Since this disables reactor functionality and is only called
when the reactor is stopping, it doesn\'t provide any directly
useful functionality, but the cleanup of reactor-related
process-global state that it does helps in unit tests
involving multiple reactors and is generally just a nice
thing.'

def _uninstallHandler(self):

    if self._childWaker:
        self._childWaker.uninstall()
