Modern usage style, aka "sandwich"

// Define abstract value type using interface, abstract class or annotation@Value.ImmutablepublicinterfaceValueObjectextendsWithValueObject {// WithValueObject is not yet generated, We extend With* to inherit `with*` method signaturesStringname();List<Integer>counts();Optional<String>description();classBuilderextendsImmutableValueObject.Builder {}// ImmutableValueObject.Builder will be generated and// our builder will inherit and reexport methods as its own.// Static nested Builder will inherit all the public method// signatures of ImmutableValueObject.Builder}// Use generated immutable implementation and builderValueObjectv =newValueObject.Builder()        .name("Nameless")        .description("present")        .addCounts(1)        .addCounts(2)        .build();v =v.withName("Doe");//fetch values via accessorsList<Integer>counts =v.counts();Optional<String>description =v.description();