String filterName = _config.getFilterName();
SymbolProvider provider = new ServletContextSymbolProvider(context);
TapestryAppInitializer appInitializer = new TapestryAppInitializer(provider, filterName, "servlet");
appInitializer.addModules(provideExtraModuleDefs(context));
_registry = appInitializer.getRegistry();
long start = appInitializer.getStartTime();
long toRegistry = appInitializer.getRegistryCreatedTime();
ServletApplicationInitializer ai = _registry.getService("ServletApplicationInitializer",
ServletApplicationInitializer.class);
ai.initializeApplication(filterConfig.getServletContext());