@Override
        public Boolean visitPackage(PackageElement e, Void p) {
          // don't validate enclosed elements because it will return types in the package
          return validateAnnotations(e.getAnnotationMirrors());
        }
Returns true if all of the given elements return true from {@link #validateElement(Element)}.
common/src/main/java/com/google/auto/common/SuperficialValidation.java