A rehashing library written in Ruby. It takes nested JSON keys such as “{a.b.c.d: true}” and will construct a fully qualified JSON object that looks like {"a":{"b":{"c":{"d":true}}}}. It accepts input from the command line or can run against a file. This is useful for ELK stacks that have input as compressed keys. Allowing you to break up the JSON data so that it can be queried easier. You will also often find such keys from dropwizard metrics.