// create db relationships
        DbRelationship rel1To2 = new DbRelationship("rel1To2");
        rel1To2.setSourceEntity(dbEntity1);
        rel1To2.setTargetEntity(dbEntity2);
        rel1To2.setToMany(true);
        rel1To2.addJoin(new DbJoin(rel1To2, e1col1.getName(), e2col2.getName()));
        dbEntity1.addRelationship(rel1To2);
        DbRelationship rel2To1 = new DbRelationship("rel2To1");
        rel2To1.setSourceEntity(dbEntity2);
        rel2To1.setTargetEntity(dbEntity1);
        rel2To1.setToMany(false);
        rel2To1.addJoin(new DbJoin(rel2To1, e2col2.getName(), e1col1.getName()));
        dbEntity2.addRelationship(rel2To1);
        assertSame(rel1To2, rel2To1.getReverseRelationship());
        assertSame(rel2To1, rel1To2.getReverseRelationship());
        assertTokensAndExecute(node, map, 4, 0);