'org.scalatra.socketio-java:socketio:2.0.0.M4'
<dependency>
<groupId>org.scalatra.socketio-java</groupId>
<artifactId>socketio</artifactId>
<version>2.0.0.M4</version>
</dependency>
<dependency org="org.scalatra.socketio-java" name="socketio" rev="2.0.0.M4"/>
"org.scalatra.socketio-java", "socketio", "2.0.0.M4"