@interface QLPreviewConverterURLProtocol : QLPreviewURLProtocol + (void)initialize; + (id)_errorForNoPreview; + (id)protocolScheme; + (void)registerPreview:(id)a0; + (void)stopLoadingProtocol:(id)a0; + (void)unregisterURLs:(id)a0 andPreview:(id)a1; @end