How to make deleted lines collapsible?

[nickkadutskyi]

I want to recreate a similar view like in IntelliJ:

And here is how it looks like in diffview:

Where it's adding new lines on the left it shows many lines indicating deleted lines but those should be collapsed into a single line. Is there a way to do that?

I use DiffviewDiffDeleteDim to highlight those deleted lines which works for when line actually was deleted but when it's in a previous state I want it to be green like in IntelliJ. Is there a way to have such highlights?

Also it would be cool to add highlight colsigns background to link those changes together.

Thanks for the plugin, works really well!