KisImage::undo() - what is it?

[Dmitry Kazakov]

Hi, All!

I still can't understand what KisImage::undo() method is supposed to do? It
seems like it reports whether it is needed to enable/disable undo
capabilities of the image or something like that. What is it used for? Is it
still actual, or it is just a historical artefact? There is a plenty of code
around, that checks this state of the image, but many instances of it look
like they were copy-pasted form somewhere, because they are not consistent.
What should i do with them?

-- 
Dmitry Kazakov
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