public String display() {
   if (ce != null) {
     return getName() + " " + RomanNumeral.convertToRoman(level);
   } else if (e != null) {
     return WordUtils.capitalizeFully(getName().replace("_", " "))
         + " "
         + RomanNumeral.convertToRoman(level);
   } else {
     return null;
   }
 }