```class ViewModel { fun sync() { setState { ...

# android-architecture

[ursus]

class ViewModel {
	
	fun sync() {
		setState { copy(syncInFlightCounter = syncInFlightCounter + 1 )}
		...
		setState { copy(syncInFlightCounter = syncInFlightCounter - 1 )}
	}

	data class State(val syncInFlightCounter = 0)
}

...

viewModel.state
	.subscribe { state ->
		progressBar.show = state.syncInFlightCounter  > 0
	}