dev@serenergy,
We’re looking into this but I’m afraid that we don’t have any information, right now, other than what is in the customization tutorial, which isn’t what you need. Customization is really aimed at modifying existing code generation templates rather than adding new generation capabilities.
You may be better off, for now, just modifying the generated code rather than trying to add new generation capability. However, if we have more information, we’ll let you know and/or update the help text.
Sorry for the inconvenience.