Would really love it is SUSHI could generate a map of .json lines to .fsh lines

If it were possible to map lines of .json produced by Sushi to original line numbers in .fsh it would be easier to walk errors produced by the FHIR ig-builder tool back to the original .fsh files.

This could be a simple file that contained something like:
input/examples/someExample.json#37=fsh/originalFile.fsh#82

It's understood that one line of fsh might map to multiple lines in json, or vice versa. The important thing for this would be that any line of .json that was affected by one or more lines of .fsh would be mapped.