private static void BuildAssetBundle(BuildTarget buildTarget)
    {
        var path = Application.streamingAssetsPath + "/" + PlatformPath.ToString(buildTarget);

        if (!Directory.Exists(path))
        {
            Directory.CreateDirectory(path);
        }
        BuildPipeline.BuildAssetBundles(path,
                                        BuildAssetBundleOptions.None,
                                        //BuildAssetBundleOptions.ForceRebuildAssetBundle,
                                        //|BuildAssetBundleOptions.IgnoreTypeTreeChanges
                                        //|BuildAssetBundleOptions.DeterministicAssetBundle,
                                        buildTarget);
        AssetDatabase.Refresh(ImportAssetOptions.Default);
    }