@Override
    public String toString() {
        if (value != null) {
            return renderFromInspector();
        }
        initContent();
        if (content.length() == 0) {
            return content;
        }
        inspect();
        return renderFromInspector();
    }
@throws IllegalArgumentException Does not accept null content
container-search/src/main/java/com/yahoo/prelude/hitfield/JSONString.java