/** Accuracy test of method <code>setType(Classifier)</code> and <code>getType()</code>. */
 public void testTypeSetterAndGetter() {
   // initial value is null
   assertNull(feature.getType());
   // set the Type with specified Classifier
   feature.setType(new MockClassifierImpl());
   assertNotNull(feature.getType());
   // set the Type with null
   feature.setType(null);
   assertNull(feature.getType());
 }