static ObjectNode createIntegration(MockIntegrationTrait integration) {
        // The MockIntegrationTrait path doesn't use the context or shape,
        // so it's safe to pass null here for those.
        return createIntegration(null, null, integration);
    }
Adds API Gateway integrations to operations.
smithy-aws-apigateway-openapi/src/main/java/software/amazon/smithy/aws/apigateway/openapi/AddIntegrations.java