Vertex v = vsi.next();
//System.out.println("v = " + v);
//System.out.println("\tin edges: " + count(v.in().toList()));
//System.out.println("\tout edges: " + count(v.out().toList()));
String name = v.<String>property("name").value();
//System.out.println("name: " + name);
if (name.equals("ripple")) {
found = true;
assertEquals(1, count(v.in().toList()));
assertEquals(0, count(v.out().toList()));