def callLater(self, s, f, *a, **k):
        # XXX TODO: return canceller
        assert f is not None
        tup = (self.time * s, f, a, k)
        self.calls.append(tup)
        self.calls.sort()
        return FakeDelayedCall(self, tup)
dataset/ETHPy150Open twisted/vertex/vertex/test/helpers.py/FakeQ2QService.callLater/operator `+` -> `*`