[Lazarus] Code Explorer synchronized with caret position

[theo]

@Dodi: Not sure if we're talking about the same thing.

I wanted a relatively non-intrusive feature, which is selecting the item 
in code explorer which corresponds to the current caret-position-context 
in the source editor.
Nothing more.
I was, and still am, under the impression, that method 
"SelectSourceEditorNode" is doing just this (probably not expanding).
Somebody please tell me if this is a wrong assumption.

Thank you.
Theo