class TransportManager {

    @Nullable
    public String getCurrentTransportName() {
        return mCurrentTransportName;
    }

      TransportManager(@UserIdInt int userId, Context context, Set<ComponentName> whitelist,
            String selectedTransport);
    @VisibleForTesting  TransportManager(
            @UserIdInt int userId,
            Context context,
            Set<ComponentName> whitelist,
            String selectedTransport,
            TransportClientManager transportClientManager);

}