[platform-dev] Update code-minings in response to an external event

[Christoph Läubrich <laeubi@xxxxxxxxxxxxxx>]

I have some codeminigs that are based on external (to the editor) sources.

I can listen for the resource changes (e.g. IResourceChangeListener) and 
now have an IResource, I can get the ITextFileBuffer but how do I notify 
the corresponding ISourceViewer?

My plan is to check for the ISourceViewerExtension5 then and call 
.updateCodeMinings();

Or is there a better approach?