parent2.put("type", "type2");
Node child1 = ds.addNode(1);
child1.put("type", "child1");
child1.put("name", "child1");
parent1.addMember(new RelationMember("", child1));
parent2.addMember(new RelationMember("", child1));
Node child2 = ds.addNode(2);
child2.put("type", "child2");
child2.put("name", "child2");
parent1.addMember(new RelationMember("", child2));
parent2.addMember(new RelationMember("", child2));