public void addSuperMethod(RefMethodImpl refSuperMethod) {
   if (!getSuperMethods().contains(refSuperMethod)
       && !refSuperMethod.getSuperMethods().contains(this)) {
     if (mySuperMethods == null) {
       mySuperMethods = new ArrayList<RefMethod>(1);
     }
     mySuperMethods.add(refSuperMethod);
   }
 }