def METHOD_NAME(self, app_vertex):
    AbstractSplitterCommon.METHOD_NAME(self, app_vertex)
    if not isinstance(app_vertex, SpikeSourcePoissonVertex):
        raise PacmanConfigurationException(
            f"The vertex {app_vertex} cannot be supported by the "
            "SplitterPoissonDelegate as the only vertex supported by this "
            "splitter is a SpikeSourcePoissonVertex. Please use the "
            "correct splitter for your vertex and try again.")