code: public static LinkedBindingBuilder<Handler> bindHandler(final Binder binder)
      {
          final Multibinder<Handler> handlers = Multibinder.newSetBinder(binder, Handler.class, HANDLER_NAMED);
          return handlers.addBinding();
      }
docs: Bind a new handler into the jetty service. These handlers are bound before the servlet handler and can handle parts
  of the URI space before a servlet sees it.
  
  Do not use this method to bind logging handlers as they would be called before any functionality has been executed and
  logging information would be incomplete. Use {@link HttpServerHandlerBinder#bindLoggingHandler(Binder) instead.