(for after the release obviously) This is a fairly popular gimp plugin. porting it was mostly makefile hijinks, plus a bit of tweaks to remove deprecation warnings so it's ready for gimp 3.0.
That plugin can recreate content from surrounding area mostly. Due to its nature, it's a bit slow, but impressive. See https://www.youtube.com/watch?v=Yn7j4_KmPp0 for a tutorial you can reproduce. (skip to 3mn30 for the actual example... up to there it's blablabla about how to install the plugin)
resynthesizer-0.16.tgz
Description: application/tar-gz
