Given:

public interface  MyInterface {}

and

public class Foo implements MyInterface {}

Trying to retrieve it from the Imported object from AddonRegistry:

Imported<MyInterface> imported = addonRegistry.getServices(MyInterface.class);

The following statements are observed:

1. imported.get() returns instance of Foo
2. imported.iterator().hasNext() returns false.

Since no @Exported is placed in MyInterface, I believe the first statement is a bug.