* @param mavenProject the requested project
     * @return The projectSegment or null.
     */
    public ProjectSegment findByMavenProject(MavenProject mavenProject) {
        return items.stream()
                .filter(pb -> mavenProject.equals(pb.getProject()))
                .findFirst()
                .orElse(null);
    }

    @Override
    public Iterator<ProjectSegment> iterator() {

        while ((queuedTask = executingTaskQueue.nextTask) != null
            && (queuedExecutor = executingTaskQueue.nextExecutor) != null) {
          executingTaskQueue.nextTask = null;
          executingTaskQueue.nextExecutor = null;
          queuedExecutor.execute(queuedTask);
        }
      } finally {
        // Null out the thread field, so that we don't leak a reference to Thread, and so that

        request = new CliRequest(new String[] {"-B"}, null);
        cli.cli(request);
        cli.properties(request);
        cli.logging(request);
        assertFalse(MessageUtils.isColorEnabled(), "Expected MessageUtils.isColorEnabled() to return false");

        MessageUtils.setColorEnabled(true);
        request = new CliRequest(new String[] {"--non-interactive"}, null);
        cli.cli(request);

class ProblemCollectorFactoryTest {

    @Test
    void testNewInstance() {
        ProblemCollector collector1 = ProblemCollectorFactory.newInstance(null);

        Problem problem = new DefaultProblem("MESSAGE1", null, null, -1, -1, null);
        ProblemCollector collector2 = ProblemCollectorFactory.newInstance(Collections.singletonList(problem));

        assertNotSame(collector1, collector2);

        return distributionName + " "
                + (version != null ? version : "<version unknown>")
                + (rev != null ? " (" + rev + ")" : "");
    }

    private static String reduce(String s) {
        return (s != null ? (s.startsWith("${") && s.endsWith("}") ? null : s) : null);
    }

    public static Properties getBuildProperties() {

  public void testToString_addValueWithNullValue() {
    String result =
        MoreObjects.toStringHelper(new TestClass())
            .addValue(null)
            .addValue("Hello")
            .addValue(null)
            .toString();
    String expected = "TestClass{null, Hello, null}";

    assertEquals(expected, result);
  }

  public void testToStringLenient_addValueWithNullValue() {
    String result =

      return;
    }

    map.put(null, unmappedValue);
    assertEquals(unmappedValue, map.get(null));
    assertTrue(map.containsKey(null));
    Entry<@Nullable K, V> entry = mapEntry(null, unmappedValue);
    assertTrue(entrySet.remove(entry));
    assertNull(map.get(null));
    assertFalse(map.containsKey(null));
  }

  public void testEntrySetRemoveNullKeyMissing() {

        if (classpath == null || classpath.isEmpty()) {
            return null;
        }

        MetadataTreeNode tree = null;
        MetadataTreeNode parent = null;

        for (ArtifactMetadata md : classpath) {
            MetadataTreeNode node = new MetadataTreeNode(md, parent, md.isResolved(), md.getArtifactScope());
            if (tree == null) {
                tree = node;
            }

   * {@code get(null)}, {@code keySet().contains(null)} or {@code remove(null)}.
   */
  ALLOWS_NULL_KEY_QUERIES,
  ALLOWS_NULL_KEYS(ALLOWS_NULL_KEY_QUERIES),
  /**
   * The map does not throw {@code NullPointerException} on calls such as {@code
   * containsValue(null)}, {@code values().contains(null)} or {@code values().remove(null)}.
   */
  ALLOWS_NULL_VALUE_QUERIES,

        append(tags)
      }
      append('}')
    }

  open class Builder {
    internal var url: HttpUrl? = null
    internal var method: String
    internal var headers: Headers.Builder
    internal var body: RequestBody? = null
    internal var cacheUrlOverride: HttpUrl? = null
    internal var tags: Tags = EmptyTags

    constructor() {
      this.method = "GET"
      this.headers = Headers.Builder()