Expandable groups in svg sequence

Question

To improve visualization of large diagrams: is it possible to support expandable group/ref notation in sequence diagrams, exported to SVG?

Same about "partitions" in activity diagrams.
Same about all type of components in components diagrams.
Same about notes in diagrams of various types: http://forum.plantuml.net/6687/expandable-notes-in-svg-exported-versions

Comments

If Plantuml team confirms the feasibility, I would want to donate for this feature. Anyone else?

Answer 1

Let's have an example with a simple expandable note.

Let's say you have the following SVG diagram :

You want that, when clicking the note : 

Is this correct ?

Comments

yes, exactly. + an ability to have all such notes initially collapsed (would be good if a note title or a cropped "1 line text..." would still be shown in the collapsed state).

And, ultimately, same capability for other elements, mentioned in the request (if those are not empty, that is, include other elements)

This would significantly improve readability of large diagrams