private static void calculateOverriddenMethods(
      PsiMethod method, Set<? super PsiMethod> overriddenMethods) {
      final PsiMethod[] superMethods = method.findSuperMethods();
      Collections.addAll(overriddenMethods, superMethods);
    }
private static void calculateOverriddenMethods(
      PsiMethod method, Set<? super PsiMethod> overriddenMethods)