Where in The Database does File Usage Data Come From How does data in file/[id]/usage get compiled?

From what tables does it determine a use?

Is there a way to track down how/where it gets this data and troubleshoot?
Does it take include revision data?
I couldn't find any /usage path in core. You must be using a custom or contrib file manager module.


  From what tables does it determine a use?


According to file_usage_list the file usage info is stored in the file_usage table, so I bet the custom or contrib module must be reading from there.