AnalyticsUiHelper.kt

// compositionLocal created for AnalyticsLogger
val LocalAnalyticsLogger = staticCompositionLocalOf<AnalyticsLogger> {
    DummyAnalyticsLogger()
}

//a helper compsable function created which is using compositionLocal LocalAnalyticsLogger
// created above and assigning default value 
// ocalAnalyticsLogger.current gets current assigned value of AnalyticsLogger which will be 
// DummyAnalyticsLogger unless a new implementation is provided
@Composable
fun LogScreenVisited(
    screenName: String,
    analyticsLogger: AnalyticsLogger = LocalAnalyticsLogger.current
) = LaunchedEffect(Unit) {
    analyticsLogger.logScreenVisited(screenName)
}