protected String configResource() {
        return "configuration-as-code.yaml";
    }
Return the resource path (yaml file) to be loaded. i.e: If the resource is in the same package of the implementor
class, then: my-config.yaml
@return the resource name and path.
test-harness/src/main/java/io/jenkins/plugins/casc/misc/RoundTripAbstractTest.java