private static boolean isInStandardLibrary(PsiMethod method) {
    PsiClass containingClass = method.getContainingClass();
    if (containingClass == null) return false;
    String classQualifiedName = containingClass.getQualifiedName();
    return classQualifiedName != null
           && (classQualifiedName.startsWith("java.")
               || classQualifiedName.startsWith("javax.")
               || classQualifiedName.startsWith("jakarta."));
  }
private static boolean isInStandardLibrary(PsiMethod method)