docs: public void copyKeys(Record recAlt, Record recMain, int iKeyArea)
      {
          BaseBuffer vector = new VectorBuffer(null);
          KeyArea keyMain = recMain.getKeyArea(iKeyArea);
          KeyArea keyAlt = recAlt.getKeyArea(iKeyArea);
          keyMain.setupKeyBuffer(vector, DBConstants.FILE_KEY_AREA);
          keyAlt.reverseKeyBuffer(vector, DBConstants.FILE_KEY_AREA);     // Move these keys back to the record
          vector.free();
      }