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-rw-r--r--src/vylist.mli2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/vylist.mli b/src/vylist.mli
index 2df1c2f..9135bf6 100644
--- a/src/vylist.mli
+++ b/src/vylist.mli
@@ -3,5 +3,5 @@ val remove : ('a -> bool) -> 'a list -> 'a list
val replace : ('a -> bool) -> 'a -> 'a list -> 'a list
val insert_before : ('a -> bool) -> 'a -> 'a list -> 'a list
val insert_after : ('a -> bool) -> 'a -> 'a list -> 'a list
-val complement : 'a list -> 'a list -> 'a list option
+val complement : 'a list -> 'a list -> 'a list
val in_list : 'a list -> 'a -> bool