// TBD is this the best method?
// TBD this should be a general utility method somewhere in the fragment
private IWorkbenchPartReference toPartRef(MPart part) {
if (part == null) return null;
Object impl = part.getObject();
if (!(impl instanceof IWorkbenchPart)) return null;
PartSite site = (PartSite) ((IWorkbenchPart) impl).getSite();
return site.getPartReference();
}
