public IDisposable Start()
{
State = ViewModelState.Processing;
return(Observable.Create <DealRowViewModel>(
async obs =>
{
_headVersion = await _dealRepo.GetAllDealUpdatesHead();
return _dealRepo.GetAllDealUpdates()
.Subscribe(obs);
})
.SubscribeOn(Scheduler.Default)
.ObserveOnDispatcher()
.Subscribe(ApplyRowUpdate));
}