Box() {
    content(myContent)
    if (blockUI) Box(Modifier.matchParentSize().pointerInput(onDismissRequest) { detectTapGestures {  } })
}

/**
 * Locks the UI behind and after 300 ms it overlays the screen with the defined color and show a progress indicator.
 */
@Composable
private fun ProgressScrim(
    modifier: Modifier = Modifier,
    color: Color = Color.Black,
    onDismiss: () -> Unit = {}
) {
    var showScrim by remember { mutableStateOf(false) }
    LaunchedEffect(key1 = onDismiss) {
        delay(300)
        showScrim = true
    }
    val alpha by animateFloatAsState(
        targetValue = if (showScrim) .8f else 0f,
        animationSpec = TweenSpec()
    )
    Box(
        modifier
            .pointerInput(onDismiss) {
                detectTapGestures { onDismiss() }
            }
            .semantics(mergeDescendants = true) {
                contentDescription = "Progress overlay"
                onClick { onDismiss(); true }
            },
        contentAlignment = Alignment.Center
    ) {
        if (showScrim) {
            Canvas(Modifier.fillMaxSize()) {
                drawRect(color = color, alpha = alpha)
            }
            CircularProgressIndicator()
        }
    }
}