def __init__(self, step, callable, *args, **kwargs):
        self.step = step
        self.call = (callable, args, kwargs)
        self.clock = None
Whether the L{onProgress} method should be called during the upload.
dataset/ETHPy150Open twisted/twisted/twisted/application/internet.py/TimerService.__init__--crossover with--dataset/ETHPy150Open rwl/muntjac/muntjac/terminal/stream_variable.py/IStreamVariable.listenProgress