It would be an interesting feature.
why don't you add it in our jira ?
(cf. http://bugs.adobe.com/jira/secure/IssueNavigator.jspa?reset=true&jqlQuery=project+%3D+CGM+ AND+resolution+%3D+Unresolved+AND+component+%3D+%22Cairngorm3+libraries%22+ORDER+BY+priori ty+DESC&mode=hide)
We'll see how many votes go for it and who wants to implement it (you can also send us a patch for it)
It's open source. the roadmap is also yours.