ViewModel state change observation

// 🍎
// In our viewDidLoad
viewModel.state.producer.take(duringLifetimeOf: self).startWithValues { [weak self] (state) in
    guard let self = self else { return }
    switch state {
        case .initial: //...
        case .error: //...
        case .loading: //...
        case .started: //...
        case .finished: //...
    }
}

// 🤖
// In our onCreate
matchViewModel.matchState.observe(this, Observer { matchState ->
    when(matchState) {
        is MatchState.Initialized -> //...
        is MatchState.Error -> //...
        is MatchState.Loading -> //...
        is MatchState.Started -> //...
        is MatchState.Finished -> //...
    }
})