docs: def build_service_class(metadata):
      """Generate a service class for the service contained in the specified metadata class."""
      i = importlib.import_module(metadata)
      service = i.service
      env = get_jinja_env()
      service_template = env.get_template('service.py.jinja2')
      with open(api_path(service.name.lower()), 'w') as t:
          t.write(service_template.render(service_md=service))