CounterWithCustomModel.kt

@Composable
fun Counter(counterModel: CounterModel) {
    Column {
        CounterHeader(counterModel)
        AddSubtractButtons(counterModel)
        CounterLabel(counterModel)
    }
}

@Composable
fun CounterHeader(counterModel: CounterModel) {
    Text(text = counterModel.header)
}

@Composable
fun AddSubtractButtons(counterModel: CounterModel) {
    Button(
        text = "Add",
        onClick = { counterModel.add() })
    Button(
        text = "Subtract",
        onClick = { counterModel.subtract() })
}

@Composable
fun CounterLabel(counterModel: CounterModel) {
    Text(text = "Clicks: ${counterModel.counter}")
}