How to ensure a method is only called once when a Screen is in the stack

[KAMO030]

Hello，How to ensure a method is only called once when a Screen is in the stack？

object A : Screen{
    @Composable
    override fun Content() {
        val currentNavigator = LocalNavigator.currentOrThrow
        LifecycleEffect(onStarted = {
            doSomething()
        })
        // ...
        currentNavigator push B
    }
}

object B : Screen{
    @Composable
    override fun Content() {
        // ...
        // Don't call the doSomething method after popping.
        LocalNavigator.currentOrThrow.pop()
    }
}
private fun doSomething() {
   // doSomething
}

What I can think of is to solve this by judging the lastEvent:

object A : Screen{
    @Composable
    override fun Content() {
        val currentNavigator = LocalNavigator.currentOrThrow
        if (currentNavigator.lastEvent == StackEvent.Replace 
            || currentNavigator.lastEvent == StackEvent.Push){
            LifecycleEffect(onStarted = {
                doSomething()
            })
        }
        // ...
        currentNavigator push B
    }
}

If there is a better solution please let me know. thank you