/**
  * Accuracy test of method <code>setMultiplicity(Multiplicity)</code> and <code>getMultiplicity()
  * </code>.
  */
 public void testMultiplicitySetterAndGetter() {
   // initial value is null
   assertNull(feature.getMultiplicity());
   // set the Multiplicity with specified Multiplicity
   feature.setMultiplicity(new MultiplicityImpl());
   assertNotNull(feature.getMultiplicity());
   // set the Multiplicity with null
   feature.setMultiplicity(null);
   assertNull(feature.getMultiplicity());
 }