message: Make GroupStoreCache global for cross-package access
diff: @@ -33,8 +33,7 @@ class GroupStoreCache {
  }
  }
  -let singletonGroupStoreCache = null;
  -if (!singletonGroupStoreCache) {
  - singletonGroupStoreCache = new GroupStoreCache();
  +if (global.singletonGroupStoreCache === undefined) {
  + global.singletonGroupStoreCache = new GroupStoreCache();
  }
  -module.exports = singletonGroupStoreCache;
  +export default global.singletonGroupStoreCache;
  