private static DocapiCommon.BucketSpace toProtoBucketSpace(String spaceName) {
        return DocapiCommon.BucketSpace.newBuilder()
                .setName(spaceName)
                .build();
    }
Implementation of MessageBus message request/response serialization built around Protocol Buffers.
documentapi/src/main/java/com/yahoo/documentapi/messagebus/protocol/RoutableFactories80.java