Web sockets - version confusion

Greetings,

Document at https://wicket.apache.org/guide/guide/nativewebsockets.html
shows maven example. I am assuming that the version in the example is
wicket version.

However maven repository search does not show jar files for version
6.18.0 or any versions in 6.* series. Wicket-native-websocket does show
all the versions at
http://search.maven.org/#search|gav|1|g%3A%22org.apache.wicket%22%20AND%20a%3A%22wicket-native-websocket%22

Is this documentation problem? Should I be using wicket-native-websocket
and not wicket-native-websocket-javax for jsr 356.

Regards,

Niranjan