return true;
  }

  @Override
  public T get() {
    return reference;
  }

  @Override
  public T or(T defaultValue) {
    checkNotNull(defaultValue, "use Optional.orNull() instead of Optional.or(null)");
    return reference;
  }

  @Override
  public Optional<T> or(Optional<? extends T> secondChoice) {
    checkNotNull(secondChoice);
    return this;
  }

  @Override

  }

  @CheckForNull private T next;

  @CheckForNull
  protected abstract T computeNext();

  @CanIgnoreReturnValue
  @CheckForNull
  protected final T endOfData() {
    state = State.DONE;
    return null;
  }

  @Override
  public final boolean hasNext() {
    checkState(state != State.FAILED);
    switch (state) {
      case DONE:
        return false;
      case READY:
        return true;

                    final Properties properties = new Properties();
                    if (is != null) {
                        try (InputStream in = is) {
                            properties.load(in);
                        }
                    }
                    String impl = properties.getProperty(slf4jBinding);
                    if (impl != null) {
                        return (Slf4jConfiguration) Class.forName(impl).newInstance();

    }

    override fun obtain(): String? = parameters.run {

        val buildTimestampFromReceipt = buildTimestampFromBuildReceipt.orNull
        if (buildTimestampFromReceipt != null) {
            println("Using timestamp from incoming build receipt: $buildTimestampFromReceipt")
            return buildTimestampFromReceipt
        }

        this.metaData = propertyMetaData
        id = "${referringClass.className}:$name"
        this.comment = comment
        if (additionalValues == null) {
            throw new NullPointerException("additionalValues constructor var is null for referringClass: $referringClass")
        }
        this.additionalValues = additionalValues
    }

    PropertyDoc forClass(ClassDoc referringClass) {

            throws ArtifactMetadataRetrievalException {
        Set<Artifact> dependencies = new HashSet<>();

        if ("g".equals(artifact.getArtifactId())) {
            Artifact a = null;
            try {
                a = factory.createBuildArtifact("org.apache.maven", "h", "1.0", "jar");
                dependencies.add(a);
            } catch (Exception e) {

public class ConsoleRepositoryListener extends AbstractRepositoryListener {

    private PrintStream out;

    public ConsoleRepositoryListener() {
        this(null);
    }

    public ConsoleRepositoryListener(PrintStream out) {
        this.out = (out != null) ? out : System.out;
    }

    public void artifactDeployed(RepositoryEvent event) {

    assertEquals("foo%7Cbar", e.escape("foo%7Cbar")); // idempotent
  }

  /** Test that giving a null 'safeChars' string causes a {@link NullPointerException}. */
  public void testBadArguments_null() {
    assertThrows(NullPointerException.class, () -> new PercentEscaper(null, false));
  }

  /**
   * Tests that specifying any alphanumeric characters as 'safe' causes an {@link

        assertTrue(updateCheckManager.isUpdateRequired(a, remoteRepository));

        file.getParentFile().mkdirs();
        file.createNewFile();
        updateCheckManager.touch(a, remoteRepository, null);

        assertFalse(updateCheckManager.isUpdateRequired(a, remoteRepository));

        assertNull(
                updateCheckManager.readLastUpdated(touchFile, updateCheckManager.getRepositoryKey(remoteRepository)));

      codePoint == '%'.code &&
      (!alreadyEncoded || strict && !input.isPercentEncoded(i, limit))
    ) {
      // Percent encode this character.
      if (encodedCharBuffer == null) {
        encodedCharBuffer = Buffer()
      }

      if (charset == null || charset == Charsets.UTF_8) {
        encodedCharBuffer.writeUtf8CodePoint(codePoint)
      } else {