public Optional<Output<String>> deprecationWarning() {
        return Optional.ofNullable(this.deprecationWarning);
    }
@return deprecationWarning overrides the default warning returned to API clients. May only be set when `deprecated` is true. The default warning indicates this version is deprecated and recommends use of the newest served version of equal or greater stability, if one exists.
sdk/java/src/main/java/com/pulumi/kubernetes/apiextensions/v1/inputs/CustomResourceDefinitionVersionPatchArgs.java