How to use the lambdarest.__init__.Response.to_json function in lambdarest

except ScopeMissing as error:
                error_description = "Permission denied"
                logging.warning(
                    logging_message.format(status_code=403, message=error_description)
                )
                error_tuple = (error_description, 403)

            except Exception as error:
                if error_handler:
                    error_handler(error, method_name)
                else:
                    raise

        body, status_code = error_tuple
        return Response(body, status_code).to_json(
            application_load_balancer=application_load_balancer
        )

def inner_lambda_handler(event, context=None):
        # check if running as "aws lambda proxy"
        if (
            not isinstance(event, dict)
            or not all(key in event for key in __required_keys)
            or not any(key in event for key in __either_keys)
        ):
            message = "Bad request, maybe not using Lambda Proxy?"
            logging.error(message)
            return Response(message, 500).to_json(
                application_load_balancer=application_load_balancer
            )

        # Save context within event for easy access
        event["context"] = context
        # for application load balancers, no api definition is used hence no resource is set so just use path
        if "resource" not in event:
            resource = event["path"]
        else:
            resource = event["resource"]

        # Fill placeholders in resource path
        if "pathParameters" in event:
            resource = check_update_and_fill_resource_placeholders(
                resource, event["pathParameters"]
            )