'radio-with-ngrepeat': {
      scope: {items: [{value: 'left', label: 'Left'}, {value: 'right', label: 'Right'}]},
      element: '<div class="btn-group">' +
               '  <label class="btn" ng-repeat="item in items"><input type="radio" ng-model="radio.value" value="{{ item.value }}" bs-radio>{{ item.label }}</label>' +
               '</div>'