'org.atmosphere.extensions:atmosphere-gwt20:2.3.0-RC3'
<dependency>
<groupId>org.atmosphere.extensions</groupId>
<artifactId>atmosphere-gwt20</artifactId>
<version>2.3.0-RC3</version>
</dependency>
<dependency org="org.atmosphere.extensions" name="atmosphere-gwt20" rev="2.3.0-RC3"/>
"org.atmosphere.extensions", "atmosphere-gwt20", "2.3.0-RC3"