Comment 3 for bug 1215878

I'm just investigating the technical prerequisites for this feature to be considered during the upcoming code improvements. Would it be sufficient to record only the dvisvgm:raw specials present inside a defstart/defend block for later usage? If yes, that's easy to implement. It would be much more complicated to consider everything wrapped by "defstart" and "defend" because that would require the management of temporary SVG trees.