@Override
 public void init(WebSecurity builder) throws Exception {
   IgnoredRequestConfigurer ignoring = builder.ignoring();
   List<String> ignored = getIgnored(this.security);
   if (this.errorController != null) {
     ignored.add(normalizePath(this.errorController.getErrorPath()));
   }
   String[] paths = this.server.getPathsArray(ignored);
   ignoring.antMatchers(paths);
 }