union method
Returns a new treap containing all items from this treap and other.
Implementation
TreapOfString union(TreapOfString other) =>
TreapOfString._(base.union(other.base));
Returns a new treap containing all items from this treap and other.
TreapOfString union(TreapOfString other) =>
TreapOfString._(base.union(other.base));