docs: public int lastModified(int iAreaDesc, boolean bForceUniqueKey)
      {   // Set up the end key
          int iLastKeyField = this.getKeyFields(bForceUniqueKey, false) - 1;
          for (int iKeyFieldSeq = iLastKeyField; iKeyFieldSeq >= DBConstants.MAIN_KEY_FIELD; iKeyFieldSeq--)
          {
              KeyField keyField = this.getKeyField(iKeyFieldSeq, bForceUniqueKey);
              if (keyField.getField(iAreaDesc).isModified())
                  return iKeyFieldSeq;
          }
          return -1;
      }