<How can I know if a empty block is passed in Kotl...

# stackoverflow

[user]

How can I know if a empty block is passed in Kotlin?
I wish uriHandler.openUri(annotation.item) can be fired when I don't pass a block paramater to AnnotatedURLText, and block() can be fired when I pass one to it.
But I find uriHandler.openUri(annotation.item) isn't fired when I run Call A, B or C, how can I fire it?
Code 1
@Composable
fun AnnotatedURLText(
...
block: ()->Unit = {}
) {

val uriHandler = LocalUriHandler.current
...

ClickableText(
...
onClick = { offset ->...