<R> int runWhenConnected(@Nonnull Request<R> request, @Nullable RequestListener<R> listener, @Nullable Object tag) { if (listener != null) { if (mCache.hasCache()) { listener = new CachingRequestListener<>(request, listener); } request.setListener(listener); } if (tag != null) { request.setTag(tag); } mPendingRequests.add(onConnectedService(request)); connect(); return request.getId(); }