public async Task <IEnumerable <FeatureDescriptor> > GetDependentFeaturesAsync(string featureId)
{
var dependants = await _featureManager.GetDependentFeaturesAsync(featureId);
var availableFeatures = await _featureManager.GetAvailableFeaturesAsync();
var availableFeaturesLookup = availableFeatures.ToLookup(f => f.Id, StringComparer.OrdinalIgnoreCase);
return(dependants
.SelectMany(id => availableFeaturesLookup[id])
.ToList());
}
