structuredAttrs is enabled

trying https://repo1.maven.org/maven2/org/eclipse/jetty/websocket/jetty-websocket-jetty-api/12.1.3/jetty-websocket-jetty-api-12.1.3.jar
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
100  32075 100  32075   0      0 118.6k      0                              0