public static Integer getFlightIdFromWebKey(String webKey) {
   if (webKey == null) return null;
   return AcFlightNumberPk.createWebKey(webKey).getFlightId();
 }
 public static String getNumberFromWebKey(String webKey) {
   if (webKey == null) return null;
   return AcFlightNumberPk.createWebKey(webKey).getNumber();
 }
 public static String getWebKey(Integer flightId, String carrierCode, String number) {
   return AcFlightNumberPk.createPk(flightId, carrierCode, number).getWebKey();
 }