public void testIdGenerationInGML() throws IOException {
TinkerGraph graph1 = new TinkerGraph();
GMLReader.inputGraph(graph1, GMLReader.class.getResourceAsStream("simple.gml"));
Vertex toRemove = graph1.getVertex("123");
graph1.removeVertex(toRemove);
String file = "/tmp/simple-" + UUID.randomUUID() + ".gml";
GMLWriter.outputGraph(graph1, file);
TinkerGraph graph2 = new TinkerGraph();