'Remove all of the state which is mutated by connection attempts and
failures, returning just the state which describes how reconnections
should be attempted.  This will make the unserialized instance
behave just as this one did when it was first instantiated.'

def __getstate__(self):

    state = self.__dict__.copy()
    for key in ['connector', 'retries', 'delay', 'continueTrying', '_callID', 'clock']:
        if (key in state):
            del state[key]
    return state
