RetrieveThingsLiveCommandImpl extends AbstractQueryLiveCommand<RetrieveThingsLiveCommand,
        RetrieveThingsLiveCommandAnswerBuilder> implements RetrieveThingsLiveCommand { @Nonnull @Override public String toString() { return getClass().getSimpleName() + "[" + super.toString() + ", namespace=" + namespace + "]"; } 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 toStringReturnsExpected() { assertThat(underTest.toString()) .contains(underTest.getClass().getSimpleName()) .contains("command=") .contains(retrieveThingTwinCommand.toString()) .contains("namespace=null"); }