How do you specify a **kwargs argument within a mistral yaml

[dmar...@gmail.com]

I have a StackStorm action that takes **kwargs and want to know how I can specify them as inputs within a mistral yaml?  In the following example, env_name, es_version and java_version would be what I need to specify as **kwargs.  I know the yaml snippet is wrong.  What is the right way?

SS action
      def create_service(name, servicetype, datacenters=[], servicelevel='Test', scale=1, parent=None, **kwargs):

yaml snippet

create_service:
    type: direct
    tasks:
        create:
            action: example.service.workflow.create_service
            input:
                name: "name"

                servicetype: "servicetype"

                datacenters: ["datacenter"]

                servicelevel: "Test"

                scale: 1

                env_name: "env_name"
                es_version: "es_version"
                java_version: "java_version"