pass a native function call to a KrollFunction invocation

app.js

var MyModule = require('com.obscure.module');
var proxy = MyModule.createMyProxy();
proxy.foogle(function(cb) {
  cb('hello, world!');
});

error

E/JNIUtil (  681): !!! Unable to convert unknown Java object class 'com.obscure.MyProxy$1$1' to Js value !!!

MyProxy.java

public void doSomething() {
}

@Kroll.method
public void foogle(KrollFunction callback) {
  final MyProxy self = this;
  callback.call(this.getKrollObject(), new Object[] {
    new KrollFunction() {
      public Object call(KrollObject krollObject, Object[] args) {
        self.doSomething();
      }
    }
    /* the rest of the KrollFunction methods elided */
  });
}