issues while compile outline apps. auto-generated java code with skipped fields and methods.

[MikhailBelkin]

Hi all,
Could anyone to help me.
I have compiled tun2sock.aar with
gomobile bind -target=android -androidapi 26 -o output/build/android/tun2socks.aar ./outline/platerrors ./outline/tun2socks ./outline

tune2socks.aar and tun2socks.jar which i build contains this comments instead some fields and methods. For example:
// skipped const InternalError with unsupported type: github.com/Jigsaw-Code/outline-apps/client/go/outline/platerrors.ErrorCode
or
// skipped field PlatformError.Code with unsupported type: github.com/Jigsaw-Code/outline-apps/client/go/outline/platerrors.ErrorCode
But for example Error.java call this method:
svcErr.code = err.getCode();
I understand why it was skipped but don't know how to build tun2socks to avoid this.
So i got several errors when build outline-apps. I am using last go and gomobile version. Could you please help me to understand what i am doing wrong

Update. Resolved this just with change type ErrorCode to string.