code: @Override
    public boolean acceptInboundMessage(final Object msg) throws Exception {
      if (!(msg instanceof FullHttpRequest))
        return false;
  
      final FullHttpRequest request = (FullHttpRequest) msg;
      final String uri = request.getUri();
      return pathResolver.isStaticPath(uri);
    }
docs: here to make sure that the message is not released twice by the dispatcherHandler and by this handler