def METHOD_NAME(cls):
    cls._PLUGIN[FieldDefaultPlugin.PLUGIN_NAME] = FieldDefaultPlugin()
    for name, obj in inspect.getmembers(sys.modules[__name__]):
        if not inspect.isclass(obj):
            continue
        if not issubclass(obj, FieldDefaultPlugin):
            continue
        cls._PLUGIN[obj.PLUGIN_NAME] = obj()