com.mxgraph.util.mxConstants.SHAPE_ELLIPSE);
graph.getStylesheet().setDefaultVertexStyle(defaultVertexStyle);
graph.getModel().beginUpdate();
try {
Object v1 = graph.insertVertex(parent, null, null, 30, 30, 30, 30);
Object v2 = graph.insertVertex(parent, null, null, 30, 130, 30, 30);
Object v3 = graph.insertVertex(parent, null, null, 110, 30, 30, 30);
graph.insertEdge(parent, null, null, v1, v2);
graph.insertEdge(parent, null, null, v1, v1);
} finally {