@Test
public void writeMarshallableHasNoSideEffects() {

    // given
    FailedItemMarshaller failedItemMarshaller = new FailedItemMarshaller();
    WireOut wireOut = mock(WireOut.class);
    // when
    failedItemMarshaller.writeMarshallable(wireOut);
    // then
    verifyZeroInteractions(wireOut);
}