def METHOD_NAME(self, markTime, delta):
    for i, (actionTime, handler, action) in enumerate(self.actions):
        if actionTime >= markTime:
            self.actions[i] = (actionTime + delta, handler, action)
    if self.firstActionTime > markTime:
        self.firstActionTime += delta
    if self.lastActionTime > markTime:
        self.lastActionTime += delta