angular.forEach(['onBeforeShow', 'onShow', 'onBeforeHide', 'onHide'], function (key) {
          var bsKey = 'bs' + key.charAt(0).toUpperCase() + key.slice(1);
          if (angular.isDefined(attr[bsKey])) {
            options[key] = scope.$eval(attr[bsKey]);
          }