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-rw-r--r--checker/subtyping.mli3
1 files changed, 3 insertions, 0 deletions
diff --git a/checker/subtyping.mli b/checker/subtyping.mli
index 07f48789d..ecdf55775 100644
--- a/checker/subtyping.mli
+++ b/checker/subtyping.mli
@@ -13,6 +13,9 @@ open Declarations
open Environ
(*i*)
+(** Invariant: the first [module_type_body] is now supposed to be
+ known by [env] *)
+
val check_subtypes : env -> module_type_body -> module_type_body -> unit