def _getDelayedCallAt(self, time):
        """
        Get a L{DelayedCall} instance at a given C{time}.

        @param time: The absolute time at which the returned L{DelayedCall}
            will be scheduled.
        """
        def noop(call):
            pass
        return DelayedCall(time, lambda: None, (), {}, noop, noop, None)

        Get a L{DelayedCall} instance at a given C{time}.

        @param time: The absolute time at which the returned L{DelayedCall}
            will be scheduled.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/test/test_base.py