b1.addCondition("TABLE.VALUE=1");
b2.addCondition("TABLE.VALUE=2");
CompatibleRelationGroup group = new CompatibleRelationGroup();
Relation r1 = b1.buildRelation();
Relation r2 = b2.buildRelation();
group.addBindingMaker(r1, bm);
assertTrue(group.isCompatible(r2));
group.addBindingMaker(r2, bm);
assertEquals(2, group.bindingMakers().size());