LGTM with unrelated nit.
http://gwt-code-reviews.appspot.com/1368801/diff/2002/user/src/com/google/gwt/validation/client/impl/ConstraintDescriptorImpl.java File user/src/com/google/gwt/validation/client/impl/ConstraintDescriptorImpl.java (right): http://gwt-code-reviews.appspot.com/1368801/diff/2002/user/src/com/google/gwt/validation/client/impl/ConstraintDescriptorImpl.java#newcode82 user/src/com/google/gwt/validation/client/impl/ConstraintDescriptorImpl.java:82: */ While at this, please remove. http://gwt-code-reviews.appspot.com/1368801/ -- http://groups.google.com/group/Google-Web-Toolkit-Contributors