* @property MetadataRetriever $metadataRetriever
* @property NetscapeBookmarkUtils $netscapeBookmarkUtils
* @property callable $notFoundHandler Overrides default Slim exception display
* @property MetadataRetriever $metadataRetriever
* @property NetscapeBookmarkUtils $netscapeBookmarkUtils
* @property callable $notFoundHandler Overrides default Slim exception display