type BoxedNode<K, V> = NonNull<LeafNode<K, V>>;Expand description
A managed, non-null pointer to a node. This is either an owned pointer to
LeafNode<K, V> or an owned pointer to InternalNode<K, V>.
However, BoxedNode contains no information as to which of the two types
of nodes it actually contains, and, partially due to this lack of information,
is not a separate type and has no destructor.