protected function mergeAppBlocksAssets(AssetCollection $assetsCollection, array $options)
 {
     $blockTypes = $this->pageBlocks->getBlockTypes();
     // When a block has examined, it is saved in this array to avoid parsing it again
     $appsAssets = array();
     // merges assets from installed apps
     foreach ($this->availableBlocks as $className) {
         if (!in_array($className, $blockTypes)) {
             continue;
         }
         if (!in_array($className, $appsAssets)) {
             $parameterSchema = '%s.%s_%s';
             $parameter = sprintf($parameterSchema, strtolower($className), $options["type"], $options["assetType"]);
             $this->addAssetsFromContainer($assetsCollection, $parameter);
             $this->addExtraAssets($assetsCollection, $parameter);
             $appsAssets[] = $className;
         }
     }
     return $assetsCollection;
 }