void (@NotNull PsiClass aClass) { // no call to super, so it doesn't drill down into inner classes final String className = aClass.getName(); if (className == null) { return; } final Set<PsiClass> alreadyVisited = new HashSet<>(8); final PsiClass[] supers = aClass.getSupers(); for (final PsiClass aSuper : supers) { if (hasMatchingName(aSuper, className, alreadyVisited)) { registerClassError(aClass); } } }