From Novemeber 2016, a couple of projects, Template and Plugin, that wrapped Processing in Kotlin and added integration with Jetbrains IDEA. The plugin added a nice keyboard shortcut so you could run a sketch with a key combination right from the Jetbrains IDE. I used it for a while to make some good generative/code art drawings.
Repository: ProcKtTemplate-master.zip
Repository: ProcKtPlugin-master.zip