public static void GetMetaData(AssetStorePublisher publisherAccount, PackageDataSource packageDataSource, DoneCallback callback)
        {
            Type doneCallbackType;
            var  doneCallback = CreateCallbackDelegate("DoneCallback", callback, out doneCallbackType);

            s_Instance.GetRuntimeType().Invoke("GetMetaData", publisherAccount.GetRuntimeObject().Param(), packageDataSource.GetRuntimeObject().Param(), new Parameter(doneCallback, doneCallbackType));
        }