Need to refresh tree on show if its data changes in the background?

[lucas-koehler]

If the tree's data is changed in another editor while the tree editor is open and then the tree editor is focused again, it doesn't automatically refresh it's content.
The question is whether this should be generally handled in the tree editor or framework or should be handled by client implementations if it is possible there.

The problem with a general implementation is that we don't know how exactly the data is loaded and how it might be changed in the background.