docs: public void addRelationship(int linkType, Record recLeft, Record recRight, int ifldLeft1, int ifldRight1, int ifldLeft2, int ifldRight2, int ifldLeft3, int ifldRight3)
      {
          String fldLeft1 = recLeft.getField(ifldLeft1).getFieldName();
          String fldRight1 = recRight.getField(ifldRight1).getFieldName();
          String fldLeft2 = ifldLeft2 != -1 ? recLeft.getField(ifldLeft2).getFieldName() : null;
          String fldRight2 = ifldRight2 != -1 ? recRight.getField(ifldRight2).getFieldName() : null;
          String fldLeft3 = ifldLeft3 != -1 ? recLeft.getField(ifldLeft3).getFieldName() : null;
          String fldRight3 = ifldRight3 != -1 ? recRight.getField(ifldRight3).getFieldName() : null;
          new TableLink(this, linkType, recLeft, recRight, fldLeft1, fldRight1, fldLeft2, fldRight2, fldLeft3, fldRight3);
      }