gwt-exporter: Exporting interfaces
===

I have a project in GWT that I am trying to export to javascript using GWT-exporter. The problem is that I have an interface which I need to export and have the client provide implementations for the methods. For example:

@Export

public interface Listener extends Exportable{

public void method1();

public void method2();

}

Could somebody please help me with this? If I can't export this, how should I go about solving this problem? 
I don't know much javascript, so any suggestions will help.
Thanks!!