Using JBDS Alpha1, I could see in the "Plugin Registry" that AS and Seam
contribute to this extension point. See screenshot for details.
You can give it a try with a more recent JBDS.
Cheers,
--
Mickael Istria
Eclipse developer at JBoss, by Red Hat <
http://www.jboss.org/tools>
My blog <
http://mickaelistria.wordpress.com> - My Tweets
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http://twitter.com/mickaelistria>