RetrieveThingLiveCommandImpl extends AbstractQueryLiveCommand<RetrieveThingLiveCommand,
        RetrieveThingLiveCommandAnswerBuilder> implements RetrieveThingLiveCommand { @Nonnull @Override public RetrieveThingLiveCommandAnswerBuilder answer() { return RetrieveThingLiveCommandAnswerBuilderImpl.newInstance(this); } private  RetrieveThingLiveCommandImpl(final RetrieveThing command); @Nonnull static RetrieveThingLiveCommandImpl of(final Command<?> command); @Override RetrieveThingLiveCommand setDittoHeaders(final DittoHeaders dittoHeaders); @Nonnull @Override RetrieveThingLiveCommandAnswerBuilder answer(); @Nonnull @Override String toString();  }
@Test public void answerReturnsNotNull() { assertThat(underTest.answer()).isNotNull(); }