The workspace editing domain API provides convenient specializations of the
EMF.Edit UI framework's undo and redo actions, that delegate to
the Eclipse Operation History API's undo/redo action handlers.
classes provide replacements for EMF's undo/redo actions that delegate to the operation
history API's action handlers. These wrappers create undo/redo action handlers on the
undo context obtained by adapting the active editor part to the IUndoContext
type. Usually this undo context is a