docs: function vPaneController ($scope) {
    var ctrl = this;
  
    ctrl.isExpanded = function isExpanded () {
      return $scope.isExpanded;
    };
  
    ctrl.toggle = function toggle () {
      if (!$scope.isAnimating && !$scope.isDisabled) {
        $scope.accordionCtrl.toggle($scope);
      }
    };
  
    ctrl.expand = function expand () {
      if (!$scope.isAnimating && !$scope.isDisabled) {
        $scope.accordionCtrl.expand($scope);
      }
    };
  
    ctrl.collapse = function collapse () {
      if (!$scope.isAnimating && !$scope.isDisabled) {
        $scope.accordionCtrl.collapse($scope);
      }
    };
  
    ctrl.focusPane = function focusPane () {
      $scope.isFocused = true;
    };
  
    ctrl.blurPane = function blurPane () {
      $scope.isFocused = false;
    };
  
    $scope.internalControl = {
      toggle: ctrl.toggle,
      expand: ctrl.expand,
      collapse: ctrl.collapse,
      isExpanded: ctrl.isExpanded
    };
  }