public static IPInvokeQueryEndNode <ILookup <TKey, TValue> > ToLookup <T, TKey, TValue>(this IPInvokeObservable <T> @this, Func <T, TKey> keySelector, Func <T, TValue> valueSelector) => @this.ToLookup(keySelector, valueSelector, EqualityComparer <TKey> .Default);
public static IPInvokeQueryEndNode <ILookup <TKey, T> > ToLookup <T, TKey>(this IPInvokeObservable <T> @this, Func <T, TKey> keySelector, IEqualityComparer <TKey> comparer) => @this.ToLookup(keySelector, x => x, comparer);