difference method
Returns a new treap containing items from this treap that are not in other.
Implementation
TreapOfString difference(TreapOfString other) =>
TreapOfString._(base.difference(other.base));
Returns a new treap containing items from this treap that are not in other.
TreapOfString difference(TreapOfString other) =>
TreapOfString._(base.difference(other.base));