diff -r a75b808d653b -r 9aa38cd4c992 src/cx/tree.h
--- a/src/cx/tree.h	Sun Sep 26 14:21:20 2021 +0200
+++ b/src/cx/tree.h	Sun Sep 26 14:41:49 2021 +0200
@@ -37,6 +37,8 @@
 extern "C" {
 #endif
 
+void* cx_tree_last(void *node, ptrdiff_t loc_next);
+    
 int cx_tree_add_node(void *node, ptrdiff_t loc_parent, ptrdiff_t loc_prev, ptrdiff_t loc_next, void *new_node);
 
 int cx_tree_add_child_node(