Frozennode\Administrator\AdminController::item PHP Method

    public function item($modelName, $itemId = 0)
    {
        $config = app('itemconfig');
        $fieldFactory = app('admin_field_factory');
        $actionFactory = app('admin_action_factory');
        $columnFactory = app('admin_column_factory');
        $actionPermissions = $actionFactory->getActionPermissions();
        $fields = $fieldFactory->getEditFields();
        //if it's ajax, we just return the item information as json
        if ($this->request->ajax()) {
            //try to get the object
            $model = $config->getModel($itemId, $fields, $columnFactory->getIncludedColumns($fields));
            if ($model->exists) {
                $model = $config->updateModel($model, $fieldFactory, $actionFactory);
            }
            $response = $actionPermissions['view'] ? response()->json($model) : response()->json(array('success' => false, 'errors' => 'You do not have permission to view this item'));
            //set the Vary : Accept header to avoid the browser caching the json response
            return $response->header('Vary', 'Accept');
        } else {
            $view = view('administrator::index', array('itemId' => $itemId));
            //set the layout content and title
            $this->layout->content = $view;
            return $this->layout;
        }
    }