Delete a deployed REST API Gateway.

def undeploy_api_gateway(self, lambda_name, domain_name=None, base_path=None):
        """
        Delete a deployed REST API Gateway.
        """
        print("Deleting API Gateway..")

        api_id = self.get_api_id(lambda_name)

        if domain_name:

            # XXX - Remove Route53 smartly here?
            # XXX - This doesn't raise, but doesn't work either.

            try:
                self.apigateway_client.delete_base_path_mapping(
                    domainName=domain_name,
                    basePath='(none)' if base_path is None else base_path
                )
            except Exception as e:
                # We may not have actually set up the domain.
                pass

        was_deleted = self.delete_stack(lambda_name, wait=True)

        if not was_deleted:
            # try erasing it with the older method
            for api in self.get_rest_apis(lambda_name):
                self.apigateway_client.delete_rest_api(
                    restApiId=api['id']
                )