public String toString(Object modelElement, NotationSettings settings) {
   return modelElement.toString() + settings.isUseGuillemets();
 }
 /**
  * Test the existence of the toString(Object modelElement, NotationSettings settings) method.
  * TODO: Need to find a more useful test.
  */
 public void testToString() {
   NotationProvider np = new NPImpl();
   NotationSettings settings = new NotationSettings();
   settings.setUseGuillemets(true);
   assertTrue("Test toString()", "atrue".equals(np.toString("a", settings)));
 }