@Test
 public void testGetConfigurationModelWrapperWhenPureVariants() {
   resourceSet = TestHelper.loadPureVariantsPackages();
   ConfigurationModelWrapper wrapper =
       FeatureAccessFactory.getConfigurationModelWrapper(pvConfigurationModelURI);
   Assert.assertTrue(wrapper instanceof PVConfigurationModelWrapper);
 }
 @Test
 public void testGetFeatureModelWrapperWhenPureVariants() {
   resourceSet = TestHelper.loadPureVariantsPackages();
   FeatureModelWrapper wrapper = FeatureAccessFactory.getFeatureModelWrapper(pvFeatureModelURI);
   System.out.println(wrapper);
   Assert.assertTrue(wrapper instanceof PVFeatureModelWrapper);
 }