public Optional<Output<String>> apiVersion() {
        return Optional.ofNullable(this.apiVersion);
    }
@return APIVersion defines the version of this resource that this field set applies to. The format is &#34;group/version&#34; just like the top-level APIVersion field. It is necessary to track the version of a field set because it cannot be automatically converted.
sdk/java/src/main/java/com/pulumi/kubernetes/meta/v1/inputs/ManagedFieldsEntryArgs.java