Hyrrokkin is a Java library to convert POJOs into a JSON feed that Ember Data can consume via its RESTAdapter. The name Hyrrokkin comes from Norse and means "Fire-smoked". Hyrokkin is also a dark, shrivelled giantess that helped get Balders ship Hringhorni rolled out to sea. (http://en.wikipedia.org/wiki/Hyrrokkin)
This was needed to compile with OpenJDK 13.