RetrieveAttributeLiveCommandImpl extends AbstractQueryLiveCommand<RetrieveAttributeLiveCommand,
        RetrieveAttributeLiveCommandAnswerBuilder> implements RetrieveAttributeLiveCommand { @Nonnull @Override public String toString() { return getClass().getSimpleName() + "[" + super.toString() + "]"; } private  RetrieveAttributeLiveCommandImpl(final RetrieveAttribute command); @Nonnull static RetrieveAttributeLiveCommandImpl of(final Command<?> command); @Nonnull @Override JsonPointer getAttributePointer(); @Override RetrieveAttributeLiveCommand setDittoHeaders(final DittoHeaders dittoHeaders); @Nonnull @Override RetrieveAttributeLiveCommandAnswerBuilder answer(); @Nonnull @Override String toString();  }
@Test public void toStringReturnsExpected() { assertThat(underTest.toString()) .contains(underTest.getClass().getSimpleName()) .contains("command=") .contains(retrieveAttributeTwinCommand.toString()); }