@Composable
fun MyButton() {
    Button(
        onClick = Launching { LoginIntent.emit() }
    ) {
        // ...
    }
}

data class LoginState(val email: String, val password: String, val isLoggedIn: Boolean) : State {
    companion object Key : State.Key<LoginState> {
        val default get() = LoginState(email = "", password = "", isLoggedIn = false)
    }
}

fun CoroutineScope.launchLoginStateActor() = launchStateProducer(LoginState) {
    var state = LoginState.default

    collectEventsAsync<EmailChangedEvent> {
        state = state.copy(email = it.email)
        state.emit()
    }

    collectEventsAsync<PasswordChangedEvent> {
        state = state.copy(password = it.password)
        state.emit()
    }

    collectEventsAsync<LoginIntent> {
        val isLoggedIn = attemptLogin(state.email, state.password)
        state = state.copy(isLoggedIn = isLoggedIn)
        state.emit()
    }
}

@Composable
fun MyLoginScreen() {
    val loginState by LoginState.collectAsState()
    MyLoginScreen(
        email = loginState.email,
        password = loginState.password
    )
}

@Composable
fun MyLoginScreen(
    email: String,
    password: String
) {
    Text(email)
    Text(password)
    Button(
        onClick = Launching { LoginIntent.emit() }
    ) {
        Text("Login")
    }
}