question: public static void registerDefaultResolvers ( ) { synchronized ( resolverList ) { resolverList . add ( new ResourceResolver ( new ResolverFragment ( ) ) ) ; resolverList . add ( new ResourceResolver ( new ResolverLocalFilesystem ( ) ) ) ; resolverList . add ( new ResourceResolver ( new ResolverXPointer ( ) ) ) ; resolverList . add ( new ResourceResolver ( new ResolverDirectHTTP ( ) ) ) ; } }
target:  This method registers the default resolvers.