@Nullable
    @Override
    public Message decode(@Nonnull RawMessage rawMessage) {
        throw new UnsupportedOperationException("MultiMessageCodec " + getClass() + " does not support decode()");
    }
@Test
    public void decodeThrowsUnsupportedOperationException() throws Exception {
        assertThatExceptionOfType(UnsupportedOperationException.class)
                .isThrownBy(() -> codec.decode(new RawMessage(new byte[0])))
                .withMessage("MultiMessageCodec " + NetFlowCodec.class + " does not support decode()");
    }