An object with values that are available in the interpolation process of the template. The default object with the available parameters can be found here. You can manipulate the object by adding new values, or replacing existing values that will be used in the template when creating the service file.
A template file that is used to generate the service. This is the default template that is used for this event: service.template.ts. You can manipulate the template or replace it completely with a new template in your plugin.