function deleteAndSaveOldCaches(cache)
        {
            if (cache.securityOrigin == securityOrigin && !updatingCachesIds.has(cache.cacheId)) {
                oldCaches.set(cache.cacheId, cache);
                this._caches.delete(cache.cacheId);
            }
        }
@param {!WebInspector.ServiceWorkerCacheModel.Cache} cache
@this {WebInspector.ServiceWorkerCacheModel}