code: def get_soap_xml(action_name, args)
        registry = get_service_registry()
        validator = ParametersValidator.new(registry)
        args = validator.validate_args(action_name, args)
        return handle_soap_request(
            action_name.to_sym, true, args, validator.extra_namespaces)
      end
docs: Generates and returns SOAP XML for the specified action and args.