docs: public static String fluentSetterName(String fieldName) {
        StringBuilder sb = new StringBuilder();
        if (fieldName != null && fieldName.length() > 0) {
           sb.append(fieldName.substring(0, 1));
           if (fieldName.length() > 1) {
              sb.append(fieldName.substring(1));
           }
        }
        return sb.toString();
     }