====== Derive4j ======
  * https://github.com/derive4j/derive4j
  * Java 8 annotation processor and framework for deriving algebraic data types constructors, pattern-matching, folds, optics and typeclasses.

===== 참조 =====
  * [[https://www.baeldung.com/derive4j|Intro to Derive4J | Baeldung]]