public void testFree() {
   final ColoredAlligator coloredAlligator =
       new ColoredAlligator(false, false, new Color(0), false);
   final Egg egg = new Egg(false, false, new Color(1), false);
   coloredAlligator.addChild(egg);
   assertTrue(Boundedness.isFree(egg));
   assertFalse(Boundedness.isBound(egg));
 }