def METHOD_NAME(self):
    yield self.setup_config_trigger_runs_forever()
    self.higherBuild = None
    def newCallback(_, data):
        if self.higherBuild is None:
            self.higherBuild = data['buildid']
        else:
            self.master.data.control(
                "stop", {}, ("builds", self.higherBuild))
            self.higherBuild = None
    yield self.runTest(newCallback, flushErrors=True)