code: function warnAttrNotSupported(className) {
      var parts = className.split("-");
      return ["$log", function($log) {
        $log.warn(className + "has been deprecated. Please use a `" + parts[0] + "-gt-<xxx>` variant.");
        return angular.noop;
      }];
    }
docs: Provide console warning that this layout attribute has been deprecated