structuredAttrs is enabled

trying https://repo1.maven.org/maven2/org/eclipse/jetty/websocket/jetty-websocket-jetty-common/12.1.3/jetty-websocket-jetty-common-12.1.3.jar
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
100  33970 100  33970   0      0 113.8k      0                              0