Index: frontend/node_modules/is-weakref/index.d.ts
===================================================================
--- frontend/node_modules/is-weakref/index.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/is-weakref/index.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,3 @@
+declare function isWeakRef<T extends WeakKey>(value: unknown): value is WeakRef<T>;
+
+export = isWeakRef;