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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 toggle_service(self):
 """ Convenience method for toggling the expansion service on or off. This is called by the global hotkey. """

        self.monitoring_disabled.emit(not self.service.is_running())
        if self.service.is_running():
            self.pause_service()
        else:
            self.unpause_service()