Workflow Loader is not finding the custom step definition

hi @danielgerlag , I'm building a workflow which has it's own custom definitions, I was able to test my workflow using workflow core directly using a console app. I see that conductor has its own script engine to validate the workflow and expecting the expression to be in python.

When I post my workflow definition to conductor Post api, it is not able to find my custom step types, hence I have made the below changes and it worked. Is there any issue in the code? or Is this feature is not supported yet?