def addHandler(self, handler):
        self.streamManager.addHandler(handler)
createButtons() -> None
dataset/ETHPy150Open ralphm/wokkel/wokkel/client.py/DeferredClientFactory.addHandler--crossover with--dataset/ETHPy150Open VisTrails/VisTrails/vistrails/gui/modules/tuple_configuration.py/PortTableConfigurationWidget.createButtons