private void Start()
        {
            _req = AbRequest.Create(finish_callback, error_callback);

            var path = "file:///" + Application.dataPath + "/example/bundle_ios/item";

            _paths.Add(path);
            _req.Request(path);

            path = "file:///" + Application.dataPath + "/example/bundle_ios/terrain";
            _paths.Add(path);
            _req.Request(path);

            path = "file:///" + Application.dataPath + "/example/bundle_ios/button";
            _paths.Add(path);
            _req.Request(path);
        }
    // Use this for initialization
    void Start()
    {
        this.req = AbRequest.Create(finish_callback, error_callback);

        string path = "file:///" + Application.dataPath + "/example/bundle/item.unity3d";

        this.paths.Add(path);
        req.Request(path);

        path = "file:///" + Application.dataPath + "/example/bundle/Terrain.unity3d";
        this.paths.Add(path);
        req.Request(path);

        path = "file:///" + Application.dataPath + "/example/bundle/Button.unity3d";
        this.paths.Add(path);
        req.Request(path);
    }