If this is what I think it is, then this is AMAZING! Every development team given the insurmountable task to migrate old code into new code (i.e. modernize a behemoth, outdated software system) should take a serious look into using Sourcetrail. It is a cross-platform source explorer (i.e. code source explorer) that analyzes unfamiliar source code and creates visual aids to help a developer (or anyone looking into the unfamiliar source code) understand at least the design structure of the source code. This is extremely useful considering how many software systems either have no documentation or outdated documentation.
I'll have to look into this more later, but definitely happy to be aware of this tool.