From https://groups.google.com/d/msg/golang-nuts/LzYlrZHkGQU/Xa8-QERRyDMJ

type TestStruct struct {
 Value string
}

type TestInterface interface {
 DoSomeWork(s *TestStruct)
}

generates

   public static abstract class Stub implements TestInterface {
            static final String DESCRIPTOR = "go.demo.TestInterface";
            
            private final go.Seq.Ref ref;
            public Stub() {
                ref = go.Seq.createRef(this);
            }
            
            public go.Seq.Ref ref() { return ref; }
            
            public void call(int code, go.Seq in, go.Seq out) {
                switch (code) {
                case Proxy.CALL_DoSomeWork: {
                    TestStruct param_s = in.readRef();  /* BUG: this should be TestStruct param_s = new TestStruct(in.readRef()) */
                    this.DoSomeWork(param_s);
                    return;
                }
                default:
                    throw new RuntimeException("unknown code: "+ code);
                }
            }
        }