Compositor for IProjectRootElements must be more adjustable
Conrete I wanted to only enable canCompose of a Deployment if the project already contains both a component and platform architecture. This is not yet possible. For now the user is presented a flashing deployment editor and a rollback exception if they try to create a deployment too early.
(from redmine: issue id 929, created on 2012-07-19, closed on 2012-07-27)