<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def pause(self):
 """Pauses all the worker threads. """

        for child in chain(self.consumers.values(), self.workers):
            child.pause()

        for child in chain(self.consumers.values(), self.workers):
            child.paused_event.wait()