enum interval_iter interval_search(struct interval_node *root,
struct interval_node_extent *ex,
interval_callback_t func, void *data);
-enum interval_iter interval_search_expand_extent(struct interval_node *root,
- struct interval_node_extent *ex,
- struct interval_node_extent *result_ext,
- interval_callback_t func, void *data);
/* Iterate every node in the tree - by reverse order or regular order. */
enum interval_iter interval_iterate(struct interval_node *root,