diff --git a/src/services/cache/CacheByUrlService.ts b/src/services/cache/CacheByUrlService.ts
index c9790078..e9cef0c8 100644
--- a/src/services/cache/CacheByUrlService.ts
+++ b/src/services/cache/CacheByUrlService.ts
@@ -22,6 +22,8 @@ export class CacheByUrlService<TValue> implements ICacheService<URL, TValue> {
     return this._promiseMap.get(url)!;
   };
 
+  has = (url: URL): boolean => this._promiseMap.has(url);
+
   invalidate = (url: URL): void => {
     this._promiseMap.delete(url);
   };