structuredAttrs is enabled

trying https://repo1.maven.org/maven2/org/eclipse/jetty/websocket/jetty-websocket-core-server/12.1.0/jetty-websocket-core-server-12.1.0.jar
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed

  0      0   0      0   0      0      0      0                              0
100  45700 100  45700   0      0 334.1k      0                              0
100  45700 100  45700   0      0 334.0k      0                              0
100  45700 100  45700   0      0 333.9k      0                              0