r1.addMember(new RelationMember("node-20",n20));
Way w30 = new Way(30, 1);
Node n21;
w30.addNode(n21 = new Node(21));
Node n22;
w30.addNode(n22 = new Node(22));
r1.addMember(new RelationMember("way-30",w30));
Relation r40 = new Relation(40);
r1.addMember(new RelationMember("relation-40", r40));
source.addPrimitive(n20);
source.addPrimitive(n21);