Elasticsearch Watcher 2.3.2 maven repo

Hi guys
while i followed
< dependency>
< groupId>org.elasticsearch.plugin< /groupId>
< artifactId>watcher< /artifactId>
< version>2.3.2< /version>
< /dependency>
to my maven project's pom.xml
it told me that the artifactid is missing
then i did go to check maven main repository
there was no this jar file in org.elasticsearch.plugin
could anybody help ?
thanks and sorry for my poor english