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-rw-r--r--util/promise.lua1
1 files changed, 1 insertions, 0 deletions
diff --git a/util/promise.lua b/util/promise.lua
index 3c3cc4df..c0176211 100644
--- a/util/promise.lua
+++ b/util/promise.lua
@@ -147,4 +147,5 @@ return {
all = all;
race = race;
try = try;
+ is_promise = is_promise;
}