'org.atmosphere:atmosphere-extras:0.5.2'
<dependency>
<groupId>org.atmosphere</groupId>
<artifactId>atmosphere-extras</artifactId>
<version>0.5.2</version>
</dependency>
<dependency org="org.atmosphere" name="atmosphere-extras" rev="0.5.2"/>
"org.atmosphere", "atmosphere-extras", "0.5.2"