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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def cancel(self, *args, **kwargs):
 """ Cancel all queue items - then attempt to cancel all in progress items """

        self._cancel_called = True
        self.clear_waiting_coordinators(cancel=True)
        super(AsperaTransferCoordinatorController, self).cancel(*args, **kwargs)