Nextflow kernel

I'm interesting to contribute a kernel for [Nextflow](https://github.com/nextflow-io/nextflow), that's a DSL/interpreter for scientific computational workflows running on top of JVM/Groovy.

In the case you are interested to such extension, is there anybody that could advice how to implement it? Being mainly a Groovy application, I guess it would require little more than repacking the Groovy kernel, adding the Nextflow libraries.