def stop(self):
        for thread_ident, i in self.threads.items():
            self.bus.publish('stop_thread', i)
        self.threads.clear()
Sets the table headers
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/cherrypy/cherrypy/process/plugins.py/ThreadManager.stop--crossover with--dataset/ETHPy150Open nacx/kahuna/kahuna/utils/prettyprint.py/PTable.headers