protected override Optional <T> TryGet(T item) { var ret = Root.FindKvp(item); return(ret.IsSome ? ret.Value.Key.AsSome() : Optional.None); }
protected override Optional <KeyValuePair <TKey, TValue> > TryGetKvp(TKey key) { return(Root.FindKvp(key)); }
public Optional <KeyValuePair <TKey, TValue> > TryGetKvp(TKey key) { return(_inner.FindKvp(key)); }