ios - app (Google cardboard SDK を使用) は拒否されました。私は今どうすればいい？

Question

リンクで説明したように

Our app (use Google cardboard SDK) has been rejected by following issue: 

```
Your app uses or references the following non-public APIs:

imageWithName:

The use of non-public APIs is not permitted on the App Store because it can lead to a poor user experience should these APIs change.
```

(Same with https://github.com/googlevr/gvr-unity-sdk/issues/296 ??)

```
/xxxxx/xxxxxx   develop  grep -r imageWithName .
Binary file ./xxxxxxx.xcworkspace/xcuserdata/xxxxxxxxxxx.xcuserdatad/UserInterfaceState.xcuserstate matches
Binary file ./Pods/GVRSDK/Libraries/libCardboardSDK_arm64.a matches
Binary file ./Pods/GVRSDK/Libraries/libCardboardSDK_armv7.a matches
Binary file ./Pods/GVRSDK/Libraries/libCardboardSDK_i386.a matches
Binary file ./Pods/GVRSDK/Libraries/libCardboardSDK_x86_64.a matches
```

アプリの承認を受けるにはどうすればよいですか?