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]);
            }