One thing to look out for. You need an `fx:id` on ...

# tornadofx

[edvin]

One thing to look out for. You need an fx:id on the include. In the root node of the included file, you need fx:controller pointing to the class of a UIComponent. However, if you add an fx:id to the root element, it will probably be overriden by the fx:id on the include. This is default JavaFX behavior though. Also, the controller would be called fx:id-from-the-include + Controller.