/// <summary>
/// Gathers all images under the given resource directory and plays them over the given duration.
/// Assumes that images are named on the form Foo-1.png, Foo-2.png, ...., Foo-n.png
/// <todo>Probably need some more error handling. </todo>
/// </summary>
/// <param name="resourceDirectoryName">Where to look for images</param>
/// <param name="assembly">Assembly to find the embeded images resources</param>
/// <param name="duration">How long one loop lasts</param>
/// <param name="overlayColor">Tint all images with the provided color.</param>
/// <returns></returns>
public static IControl Animation(string resourceDirectoryName, Assembly assembly, TimeSpan duration, IObservable <Color> overlayColor = null)
{
var resourceCache = _resourceCaches.GetOrAdd(assembly, a => a.GetManifestResourceNames().ToImmutableHashSet());
var resources = resourceCache
.Where(k => k.Contains(resourceDirectoryName))
.ToImmutableSortedSet(new AnimationImageNameComparer())
.Select(resource => new ImageStream(scaleFactor: 1, create: () => assembly.GetManifestResourceStream(resource)))
.ToList();
return(Implementation.Animate(resources, duration, overlayColor));
}