[xwiki-devs] Composable

In http://platform.xwiki.org/xwiki/bin/view/DevGuide/WritingComponents <http://platform.xwiki.org/xwiki/bin/view/DevGuide/WritingComponents%20the%20org.xwiki.component.phase.Composable> the Composable interface is described but as been moved to a different package in 2.0. Has this been deprecated or is another method recommended for 2.0? I see the release notes for 2.0 mention a new way to register for startup or shutdown events. Is this documented anywhere or a pointer to a component using this available? Thanks, Glenn