code: public function renderSystemIntent()
      {
          $out = [];
          $items = [];
  
          foreach ($this->options as $option) {
              $items[] = $option->render();
          }
  
          $out['intent'] = 'actions.intent.OPTION';
          $out['data'] = [
              '@type'          => 'type.googleapis.com/google.actions.v2.OptionValueSpec',
              'carouselSelect' => [
                  'imageDisplayOptions' => $this->imageDisplayOptions,
                  'items'               => $items,
              ],
          ];
  
          return $out;
      }
docs: Render System Intent as array.
  
  @return null|array