def test_new_subset_action(self):
        layer = self.add_layer()
        self.new_action.trigger()
        assert len(self.collect.subset_groups) == 1
Set all classes in a module derived from C{baseClass} as copiers for
dataset/ETHPy150Open glue-viz/glue/glue/app/qt/tests/test_layer_tree_widget.py/TestLayerTree.test_new_subset_action--crossover with--dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/spread/jelly.py/setUnjellyableForClassTree