docs: public BaseField[][] getKeyMap(Record recSummary, Record recBasis)
      {
          BaseField[][] mxKeyFields = new BaseField[recSummary.getKeyArea().getKeyFields()][2];
          for (int i = 0; i < mxKeyFields.length; i++)
          {
              mxKeyFields[i][SUMMARY] = recSummary.getKeyArea().getField(i);
              mxKeyFields[i][BASIS] = this.getBasisField(mxKeyFields[i][SUMMARY], recBasis, i);
          }
          return mxKeyFields;
      }