boundaryPanel.setSize("20000px", "20000px");
viewPanel.add(boundaryPanel, 0, 0);
RootPanel.get().add(viewPanel, 0, 0);
final Diagram diagram = new Diagram(boundaryPanel);
boundaryPanel.add(new Label("Connectors example for GWT 2.4"), 10, 2);
Connector connector1 = new Connector(50, 80, 150, 200, new SectionDecoration(DecorationType.ARROW_SOLID), new SectionDecoration(DecorationType.ARROW_SOLID));
connector1.showOnDiagram(diagram);