docs: public KeyField getKeyField(int iKeyFieldSeq, boolean bForceUniqueKey)
      {
          KeyField keyField = null;
          if (iKeyFieldSeq != this.getKeyFields(false, true))
              keyField = this.getKeyField(iKeyFieldSeq);
          else
              keyField = this.getRecord().getKeyArea(0).getKeyField(0);  // Special - key must be unique
          return keyField;
      }