/// <summary>
/// Returns the value of <paramref name="maybeCollection"/> if exists orlse an empty collection
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="maybeCollection"></param>
/// <returns></returns>
public static IEnumerable <T> FromMaybe <T>(this Maybe <IEnumerable <T> > maybeCollection)
{
return(maybeCollection.HasValue ? maybeCollection.Value : Enumerable.Empty <T>());
}