I'm using CTools content types to make highly customized Panels panes. The panes together form a Panels Node (I'm using the Panels default module for this).
The Panels node itself can be revisioned, but these revisions do not include changes to the content that lives in the panes. It seems that the content of the panes themselves cannot be revisioned.
Is there a way to use revisions/workflow/workbench/anything to control the publishing flow of the panes?