Spark: Read JSON references

https://stackoverflow.com/questions/20029412/scala-play-parse-json-into-map-instead-of-jsobject/20034844#20034844

https://manuel.bernhardt.io/2015/11/06/a-quick-tour-of-json-libraries-in-scala/

https://coderwall.com/p/o--apg/easy-json-un-marshalling-in-scala-with-jackson

https://www.scalawilliam.com/scala-json/

https://github.com/circe/circe

https://circe.github.io/circe/

https://github.com/non/jawn