@Shawn That does not work on overloaded function😞

Sorry. Misunderstand you. You can just specify type for your property explicitly if you have a few candidates:

val toast: (String) -> Unit = activity::toast

That kind of work

yes, first one is most efficient. Only method call. 2 and 3 create additional objects: 2 - method reference and 3 - lambda (and method call of course)

Oh I guess I'll just use the first one to forward the method call then, so much typing needed😂