private static String findSuperClass(PsiClass psiClass,
                                       PsiClass expectedClass,
                                       Set<String> candidates) {
    var processor = new Processor<PsiClass>() {
      String myResult;

      @Override
      public boolean process(PsiClass superClass) {
        String qualifiedName = superClass.getQualifiedName();
        if (qualifiedName != null && candidates.contains(qualifiedName)) {
          if (InheritanceUtil.isInheritorOrSelf(superClass, expectedClass, true)) {
            myResult = qualifiedName;
          }
          return false;
        }
        return true;
      }
    };
    InheritanceUtil.processSupers(psiClass, true, processor);
    return processor.myResult;
  }
private static String findSuperClass(PsiClass psiClass,
                                       PsiClass expectedClass,
                                       Set<String> candidates)