Actually, it is a stackpane ```override val root ...

# tornadofx

[permalmberg]

Actually, it is a stackpane

override val root = listview(pallet.categories.observable()) {
        prefWidth = 300.0
        cellCache {
            TitledPane(it.category,
                    listview(it.components) {
                        cellCache {
                            stackpane {
                                this += ComponentView(0.0, 0.0, it)
                            }
                        }
                    }
            )
        }
    }