Reflection on JavaFx

Question

On Java, when we want to invoke a method from an existing instance of an object, we can simply call:
public Object invoke(Object obj,
                     Object... args)
              throws IllegalAccessException,
                     IllegalArgumentException,
                     InvocationTargetExceptionPassing the object reference in obj.
But I can't do the same in JavaFx.
In JavaFx we need FXFunctionMember and FXObjectValue to invoke a method.
I could obtain FXFunctionMember using getFunction(...) on ClassType class.
Most exemples that I saw was creating an instance and then using it. But I don't know how I can obtain a FXObjectValue object to an instance that already being created.
I read a lot of the JavaFx API reflexive package and yet I haven't found anything.

Answer 1

var foocls = FXContext.getInstance().findClass("Foo");
var fun : FXFunctionMember = foocls.getFunction("bar");
var obj = Foo{};
var objval = FXLocal.getContext().mirrorOf(obj);
fun.invoke(objval);