Node s1 = model.createNode(set1);
Node n11 = model.createNode(o11);
Node n12 = model.createNode(o12);
model.addNode(this, s1, root);
model.addNode(this, n11, root);
model.addNode(this, n12, root);
Edge e6 = model.createEdge("e6");
Edge e7 = model.createEdge("e7");
model.connectEdge(this, e6, s1, n11);
model.connectEdge(this, e7, s1, n12);