Plugin page: http://artifacts.griffon-framework.org/plugin/kotlin
The Kotlin plugin enables compiling and running [Kotlin]]1 code on your Griffon application. Kotlin is a statically typed language for the JVM that has a great level of interoperability with Java, and so with Groovy too.
You must place all Kotlin code under $appdir/src/kotlin, it will be compiled first before any sources available on
griffon-app or src/main which means you can't reference any of those sources from your Kotlin code, while the
Groovy sources can.