drawer = new Drawer("Properties", new HTML("Properties"), DrawerLayout.Position.RIGHT);
drawer.setMinSize(500);
layout.addDrawer(drawer);
drawer = new Drawer("Navigation", navigation, DrawerLayout.Position.LEFT);
layout.addDrawer(drawer);
drawer = new Drawer("Navigation 2", new HTML("Navigation 2"), DrawerLayout.Position.LEFT);
layout.addDrawer(drawer);
Button button = new Button("Close Navigation");