* client, either a toplevel (application window) or popup. */

	 * client, either a toplevel (application window) or popup,
	 * or when wlr_layer_shell receives a new popup from a layer.
	 * If you want to do something tricky with popups you should check if
	 * its parent is wlr_xdg_shell or wlr_layer_shell */

	layersurface->scene = wlr_scene_subsurface_tree_create(
			layers[wlr_layer_surface->pending.layer],

	layersurface->scene = wlr_layer_surface->surface->data =
			wlr_scene_subsurface_tree_create(layers[wlr_layer_surface->pending.layer],