public DismissableOnboardingStep(IOnboardingStep onboardingStep, string key, IOnboardingStorage onboardingStorage)
{
Ensure.Argument.IsNotNull(onboardingStep, nameof(onboardingStep));
Ensure.Argument.IsNotNullOrWhiteSpaceString(key, nameof(key));
Ensure.Argument.IsNotNull(onboardingStorage, nameof(onboardingStorage));
this.onboardingStorage = onboardingStorage;
Key = key;
wasDismissedSubject = new BehaviorSubject <bool>(
onboardingStorage.WasDismissed(this)
);
ShouldBeVisible = onboardingStep
.ShouldBeVisible
.CombineLatest(
wasDismissedSubject.AsObservable(),
(shouldBeVisible, wasDismissed) => shouldBeVisible && !wasDismissed);
}