[news.eclipse.platform] Compare Example

[cocoa@xxxxxx]

I'm trying to implement compare support for a custom content type. The
content type is structured, so I've figured out how to add an extension
for the org.eclipse.compare.structureCreators extension point. The
IStructureCreator works, i.e. the upper part of the CompareEditor is correctly
displaying the hierarchy of all the changes.
The problem I have now is that the lower part of the compare editor (the
part having two sides, left and right, showing the differences) is
still text based. I'd like to show a custom viewer for the left / right
side, let's say a tree viewer. Does anybody have an example how to achieve
that? 
Simon