Please refer to https://github.com/xaadin/xaadin.
'com.xaadin:xaadin:0.2'
<dependency>
<groupId>com.xaadin</groupId>
<artifactId>xaadin</artifactId>
<version>0.2</version>
</dependency>
<dependency org="com.xaadin" name="xaadin" rev="0.2"/>
"com.xaadin", "xaadin", "0.2"