ShareState.kt

class MainViewModel(
    private val repository: Repository
) {
    val counterFlow = repository.getCounterFlow().asStateFlow()

    fun increaseCounter() {
        repository.increaseCounter()
    }

    fun decreaseCounter() {
        repository.decreaseCounter()
    }
}

class NewsViewModel(
    private val repository: Repository
) {
    val counterFlow = repository.getCounterFlow().asStateFlow()

    fun increaseCounter() {
        repository.increaseCounter()
    }

    fun decreaseCounter() {
        repository.decreaseCounter()
    }
}

// Using `object` here for sample, you can replace by hilt singletone module.
object Repository(
    private val counterDao: CounterDao
) {
    fun getCounterFlow() = counterDao.getCounterFlow()

    fun increaseCounter() {
        counterDao.increaseCounter()
    }

    fun decreaseCounter() {
        counterDao.decreaseCounter()
    }
}