### Question:
StorageMessageCodecV0 implements MessageCodec { @Override public short version() { return VERSION; }  @Override byte magicByte(); @Override short version(); @Override Message decode(MessageAttributeReader reader); @Override void encode(Message msg, MessageAttributeWriter writer); static final StorageMessageCodecV0 INSTANCE; }### Answer:
@Test public void testCodecVersion() { assertEquals(0, codec.version()); }