def test_empty_registry(self):

        registry = self.registry

        # Make sure there are no extensions.
        extensions = registry.get_extensions('my.ep')
        self.assertEqual(0, len(extensions))

        # Make sure there are no extension points.
        extension_points = registry.get_extension_points()
        self.assertEqual(0, len(extension_points))

        return
All column names associated with the data.
dataset/ETHPy150Open enthought/envisage/envisage/tests/extension_registry_test_case.py/ExtensionRegistryTestCase.test_empty_registry--crossover with--dataset/ETHPy150Open bokeh/bokeh/bokeh/charts/data_source.py/ChartDataSource.columns