protected override ImmSortedMap <TKey, TValue> Join(ImmSortedMap <TKey, TValue> other, ValueSelector <TKey, TValue, TValue, TValue> collision = null) { return(Root.Intersect(other.Root, Lineage.Mutable(), collision).WrapMap(Comparer)); }
protected override ImmSortedSet <T> Intersect(ImmSortedSet <T> other) { return(Root.Intersect(other.Root, Lineage.Mutable(), null).Wrap(Comparer)); }