List<Artifact> list = new ArrayList<>();
        list.add(newArtifact("b"));
        list.add(newArtifact("a"));
        list.add(newArtifact("c"));
        list.add(newArtifact("e"));
        list.add(newArtifact("d"));

        Map<String, Artifact> map = ArtifactUtils.artifactMapByVersionlessId(list);
        assertNotNull(map);
        assertEquals(list, new ArrayList<>(map.values()));
    }

    @Override
    protected MavenOptions parseArgs(String source, List<String> args) throws ParserException {
        try {
            return CommonsCliMavenOptions.parse(source, args.toArray(new String[0]));
        } catch (ParseException e) {
            throw new ParserException("Failed to parse source " + source, e.getCause());
        }
    }

    // TODO: same is in DefaultMavenParser!!! (duplication)
    @Override

            return (String) method.invoke(instance, message, possibleValues, defaultReply);
        } catch (Exception e) {
            throw new PrompterException("Unable to call prompter", e);
        }
    }

    @Override
    public String promptForPassword(String message) throws PrompterException {
        try {

    Comparable<?> endpoint() {
      throw new IllegalStateException("range unbounded on this side");
    }

    @Override
    boolean isLessThan(Comparable<?> value) {
      return true;
    }

    @Override
    BoundType typeAsLowerBound() {
      throw new IllegalStateException();
    }

    @Override
    BoundType typeAsUpperBound() {

      return (Multiset.Entry<E>[]) new Multiset.Entry<?>[length];
    }

    @Override
    public Iterable<Entry<E>> order(List<Entry<E>> insertionOrder) {
      // We mimic the order from gen.
      Map<E, Entry<E>> map = new LinkedHashMap<>();
      for (Entry<E> entry : insertionOrder) {
        map.put(entry.getElement(), entry);
      }

      Set<E> seen = new HashSet<>();

      return (Multiset.Entry<E>[]) new Multiset.Entry<?>[length];
    }

    @Override
    public Iterable<Entry<E>> order(List<Entry<E>> insertionOrder) {
      // We mimic the order from gen.
      Map<E, Entry<E>> map = new LinkedHashMap<>();
      for (Entry<E> entry : insertionOrder) {
        map.put(entry.getElement(), entry);
      }

      Set<E> seen = new HashSet<>();

                new ConflictResolver(
                        new NearestVersionSelector(), new ManagedScopeSelector(getScopeManager()),
                        new SimpleOptionalitySelector(), new ManagedScopeDeriver(getScopeManager())),
                new ManagedDependencyContextRefiner(getScopeManager()));
    }

    /**
     * This method produces "surrogate" type registry that is static: it aims users that want to use

    TestService service = new TestService();
    assertEquals(0, service.startUpCalled);
    service.startAsync().awaitRunning();
    assertEquals(1, service.startUpCalled);
    assertEquals(Service.State.RUNNING, service.state());
    assertThat(service.transitionStates).containsExactly(Service.State.STARTING);
  }

  public void testStart_failed() {
    final Exception exception = new Exception("deliberate");

      return new Object[length];
    }

    @Override
    public SampleElements<Entry<TypeToken, Object>> samples() {
      return new SampleElements<>(
          entry(TypeToken.of(Integer.class), 0),
          entry(TypeToken.of(Number.class), 1),
          entry(new TypeToken<ImmutableList<Integer>>() {}, ImmutableList.of(2)),
          entry(new TypeToken<int[]>() {}, new int[] {3}),

    }
  }

  private <T extends @Nullable Object> void actsLikeIteratorHelper(final List<T> list) {
    // Check with modifiable copies of the list
    new PeekingIteratorTester<T>(list).test();

    // Check with unmodifiable lists
    new IteratorTester<T>(
        list.size() * 2 + 2, UNMODIFIABLE, list, IteratorTester.KnownOrder.KNOWN_ORDER) {
      @Override
      protected Iterator<T> newTargetIterator() {