API to visually log ranges and positions

[oleq]

I think it would be pretty handy if there was an API such as CKEditorInspector.drawModelRange( ... ) (the name is just the first thing that popped into my head) that would draw the range/position in the model/view tree next to the selection. 

A lot of time I find myself struggling to understand some logic because I have to browse range/position properties manually. Seeing ranges and positions just there in the tree would be awesome. 

Also, they would naturally disappear on the next change event so probably the only sensible way of using them would mean immediately running the debugger. The question is how would it work with the inspector being built on top of React with its custom asynchronous rendering loop. Would it catch up?