RetrieveThingsLiveCommandImpl extends AbstractQueryLiveCommand<RetrieveThingsLiveCommand,
        RetrieveThingsLiveCommandAnswerBuilder> implements RetrieveThingsLiveCommand { @Nonnull @Override public RetrieveThingsLiveCommandAnswerBuilder answer() { return RetrieveThingsLiveCommandAnswerBuilderImpl.newInstance(this); } private  RetrieveThingsLiveCommandImpl(final RetrieveThings command); @Nonnull static RetrieveThingsLiveCommandImpl of(final Command<?> command); @Nonnull @Override List<ThingId> getThingEntityIds(); @Nonnull @Override Optional<String> getNamespace(); @Override RetrieveThingsLiveCommand setDittoHeaders(final DittoHeaders dittoHeaders); @Nonnull @Override RetrieveThingsLiveCommandAnswerBuilder answer(); @Nonnull @Override String toString();  }
@Test public void answerReturnsNotNull() { Assertions.assertThat(underTest.answer()).isNotNull(); }