messager.printMessage(Diagnostic.Kind.ERROR, "Failed to generate class file " + className + ". " + e.getMessage(), element);
            }
        }
        """
    }

    private String getSourceGeneratorCode() {
        """
    for (Element element : elements) {
        TypeElement typeElement = (TypeElement) element;
        String className = typeElement.getSimpleName().toString() + "Helper";
        try {