'org.igniterealtime.smack:smack-extensions:4.0.0-rc1'
<dependency>
<groupId>org.igniterealtime.smack</groupId>
<artifactId>smack-extensions</artifactId>
<version>4.0.0-rc1</version>
</dependency>
<dependency org="org.igniterealtime.smack" name="smack-extensions" rev="4.0.0-rc1"/>
"org.igniterealtime.smack", "smack-extensions", "4.0.0-rc1"