Extension method conflicts with existing method from multiple supertypes

[EotT123]

I added an extension method for org.w3c.dom.NodeList to provide a stream() method which works as expected. However, this approach breaks when trying to call stream() on instances of org.htmlunit.html.DomNodeList.

The issue is that DomNodeList extends both NodeList (which I've extended with stream()) and List, which already defines its own stream() method. As a result, the compiler fails with the following message: reference to stream is ambiguous

[rsmckinney]

Adding discord discussion.

[rsmckinney]

I will at least update the documentation to cover this use case. Probably an example like:

public interface Named {
  String getName();
}
public interface NickNamed {
  String getNickName();
}
public class Bob implements Named, NickNamed {
  public String getName() { return "Robert"; }
  public String getNickName() { return "Bob"; }
}
@Extension
public class NamedExt {
  public static String getNickName(@This Named thiz) { return thiz.getNamed().substring(0, 3); }
}

Bob bob = new Bob();
bob.getNickName(); // error: ambiguous
((NickNamed)bob).getNickName(); // "Bob"
((Named)bob).getNickName(); // "Rob"

This behavior is similar to C# and other languages that support multiple explicit interface implementation.