will it be supported to pass

Composable

function as a reference?

posts.map(::PostCard)

for example

I'd also like to know, why it's not supported I don't see any explanation in the compiler source https://github.com/androidx/androidx/blob/1f98d8c9b5c8d864482e3b0d591e70f3ef0701bc[…]droidx/compose/compiler/plugins/kotlin/ComposableCallChecker.kt