There's a new feature in EAP 6.3.0.Beta which is not documented in RN: https://issues.jboss.org/browse/EAP6-188 Document URL: http://documentation-devel.engineering.redhat.com/site/documentation/en-US/JBoss_Enterprise_Application_Platform/6.3/html-single/6.3.0_Release_Notes/index.html#idp89116048
This feature has been added to the new features section of the release notes.
Verified, revision 6.3.0-5