}
@Override
protected void createEditPolicies() {
installEditPolicy(EditPolicy.COMPONENT_ROLE,
new DeleteComponentEditPolicy());
installEditPolicy(EditPolicy.LAYOUT_ROLE, new LayoutPolicy());
installEditPolicy(EditPolicy.GRAPHICAL_NODE_ROLE,
new EdgeGraphicalNodeEditPolicy());
installEditPolicy(EditPolicy.DIRECT_EDIT_ROLE,
new VertexDirectEditPolicy());