'org.kill-bill.billing:killbill-api:0.21'
<dependency>
<groupId>org.kill-bill.billing</groupId>
<artifactId>killbill-api</artifactId>
<version>0.21</version>
</dependency>
<dependency org="org.kill-bill.billing" name="killbill-api" rev="0.21"/>
"org.kill-bill.billing", "killbill-api", "0.21"