LGTM. With a Nit.
http://gwt-code-reviews.appspot.com/1565806/diff/8001/user/test/com/google/gwt/editor/client/DirtyEditorTest.java File user/test/com/google/gwt/editor/client/DirtyEditorTest.java (right): http://gwt-code-reviews.appspot.com/1565806/diff/8001/user/test/com/google/gwt/editor/client/DirtyEditorTest.java#newcode182 user/test/com/google/gwt/editor/client/DirtyEditorTest.java:182: OptionalFieldEditor.of(ListEditor.<Person, PersonEditor> of(new EditorSource<PersonEditor>() { Line length. http://gwt-code-reviews.appspot.com/1565806/ -- http://groups.google.com/group/Google-Web-Toolkit-Contributors
