openjfx and shadowjar bigjar

[Michael Anderl]

Is it possible to build a jar for openjdk11 with openjfx11 inside?
(with the gadle tool shadowjar)
I am able to make a jar with all the javafx.* classes inside, but with
java -jar test.jar I get
Error: JavaFX runtime components are missing, and are required to run
this application

Is somewhere a tutorial with a multi release onebigfatjar for java8 &
java11 and java11 has all the javafx stuff inside? is this even
possible?

thx
mike