let (k, v, r) = P::current(txn, current.page.as_page(), &mut current.cursor).unwrap();
            last_match = Some((k, v));
            if r > 0 {
                let page = txn.load_page(r)?;
                self.push(PageCursor {
                    cursor: P::cursor_last(&page),
                    page,
                })

            if let Some((k, v, r)) = P::current(txn, current.page.as_page(), &mut current.cursor) {
                last_match = Some((k, v));
                if r > 0 {
                    let page = txn.load_page(r)?;
                    self.push(PageCursor {
                        cursor: P::cursor_last(&page),
                        page,
                    })
                } else {
                    break;
                }

                break;

                // The page is empty, meaning there's no right or left child.
                debug_assert!(P::is_init(&current.cursor));
                // Assert we're looking at the root.
                debug_assert_eq!(self.len, 1);
                // And the root has no child.
                debug_assert_eq!(P::right_child(current.page.as_page(), &current.cursor), 0);
                return Ok(None);