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-rw-r--r--src/vytree.mli2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/vytree.mli b/src/vytree.mli
index 02d8edf..9bc8844 100644
--- a/src/vytree.mli
+++ b/src/vytree.mli
@@ -23,7 +23,7 @@ val insert : ?position:position -> 'a t -> string list -> 'a -> 'a t
val insert_multi_level : 'a -> 'a t -> string list -> string list -> 'a -> 'a t
-val merge_children : 'a t -> 'a t
+val merge_children : ('a -> 'a -> 'a) -> 'a t -> 'a t
val delete : 'a t -> string list -> 'a t