Create a custom view for nodes.
GNDecorator window = new GNDecorator();
window.setContent(root);
window.initTheme(GNDecorator.Theme.DARKULA);
window.setIcon(icon);
window.setTitle("Title");
root -> SstackPane
body -> AnchorPane
top_left -> Path
top_right -> Path -- rotation 90°
bottom_left -> Path -- rotation 270°
bottom_right -> Path -- rotation 180°