Method insert

src/tree/binary/rb.rs:136–138

(&mut self, key: K, val: V)

    K: Ord,
{
    fn insert(&mut self, key: K, val: V) {
        self.root = insert(self.root, key, val);
    }
}

fn insert<K, V>(root: Option<NonNull<Node<K, V>>>, key: K, val: V) -> Option<NonNull<Node<K, V>>>