/**
     * Refreshes all ports in the diagram. This is necessary in order correctly move ports, which
     * does not work due to GMF bugs. See Eclipse bug #291484.
     * 
     * @param editor
     *            the diagram editor
     * @param rootPart
     *            the root edit part
     * @see https://bugs.eclipse.org/bugs/show_bug.cgi?id=291484
     */
    private static void refreshDiagram(final DiagramEditor editor, final IGraphicalEditPart rootPart) {
        EditPart editPart = rootPart;
        if (editPart == null) {
            editPart = editor.getDiagramEditPart();
        }
        for (Object obj : editPart.getViewer().getEditPartRegistry().values()) {
            if (obj instanceof ShapeNodeEditPart) {
                IFigure figure = ((ShapeNodeEditPart) obj).getFigure();
                if (figure instanceof BorderedNodeFigure) {
                    IFigure portContainer = ((BorderedNodeFigure)    figure).getBorderItemContainer();
                    portContainer.invalidate();
                    portContainer.validate();
                }
            }
        }
    }