@Override
                    public byte getOrder() {
                        return -127;
                    }
This test asserts two things: First, it ensures that any existing CORS headers
set on an explicitly added API Gateway integration are not overwritten
(i.e., the "Access-Control-Allow-Origin" is "domain.com" instead of https://foo.com).
Next, it asserts that any other headers in the gateway response show up in the
injected Access-Control-Expose-Headers header.
smithy-aws-apigateway-openapi/src/test/java/software/amazon/smithy/aws/apigateway/openapi/CorsTest.java