/// <summary>
/// Gets the contains set.
/// </summary>
/// <returns></returns>
public HashSet <string> GetContainsSet() => _proxySink.GetContainsSet(() => Packs.Aggregate(new HashSet <string>(StringComparer.OrdinalIgnoreCase), (a, b) => { a.UnionWith(b.GetContainsSet()); return(a); }));
/// <summary> /// Gets the contains set. /// </summary> /// <returns></returns> public HashSet <string> GetContainsSet() => _proxySink.GetContainsSet(() => _pakFile.GetContainsSet());