return this;
    }

    @Override
    public List<String> getModelIds() {
        return modelIds;
    }

    public DefaultModelBuildingResult addModelId(String modelId) {
        // Intentionally notNull because Super POM may not contain a modelId
        Objects.requireNonNull(modelId, "modelId cannot null");

        modelIds.add(modelId);

        return this;
    }

    @Override

        MultiValidationBean bean = new MultiValidationBean();
        bean.setRequiredCron(null); // Violates NotNull

        Set<ConstraintViolation<MultiValidationBean>> violations = validator.validate(bean);
        assertEquals(1, violations.size()); // Only NotNull violation

        bean.setRequiredCron("invalid"); // Now violates CronExpression
        violations = validator.validate(bean);

  }

  @Override
  public T or(Supplier<? extends T> supplier) {
    return checkNotNull(
        supplier.get(), "use Optional.orNull() instead of a Supplier that returns null");
  }

  @Override
  public @Nullable T orNull() {
    return null;
  }

  @Override
  public Set<T> asSet() {
    return Collections.emptySet();
  }

  @Override
  public <V> Optional<V> transform(Function<? super T, V> function) {

val artifactoryUrl
    get() = System.getenv("GRADLE_INTERNAL_REPO_URL") ?: ""

val artifactoryUserName
    get() = project.providers.gradleProperty("artifactoryUserName").orNull

val artifactoryUserPassword
    get() = project.providers.gradleProperty("artifactoryUserPassword").orNull

tasks.withType<AbstractPublishToMaven>().configureEach {
    val noUpload = project.gradleProperty("noUpload")

  public boolean isPresent() {
    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

                timeZone = TimeZone.getTimeZone("UTC")
            }
            return formatter.format(Date(0L))
        }

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

val signArtifacts: Boolean = !pgpSigningKey.orNull.isNullOrEmpty()

tasks.withType<Sign>().configureEach { isEnabled = signArtifacts }

signing {
    useInMemoryPgpKeys(pgpSigningKey.orNull, pgpSigningPassPhrase.orNull)
    publishing.publications.configureEach {
        if (signArtifacts) {
            signing.sign(this)
        }
    }

  public boolean isPresent() {
    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

   */
  @SuppressWarnings("AmbiguousMethodReference") // We chose the name despite knowing this risk.
  public java.util.Optional<T> toJavaUtil() {
    return java.util.Optional.ofNullable(orNull());
  }

  Optional() {}

  /**
   * Returns {@code true} if this holder contains a (non-null) instance.
   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> no differences.
   */

  // If users use this when they shouldn't, we hope that NewApi will catch subsequent Optional calls
  @IgnoreJRERequirement
  public java.util.Optional<T> toJavaUtil() {
    return java.util.Optional.ofNullable(orNull());
  }

  Optional() {}

  /**
   * Returns {@code true} if this holder contains a (non-null) instance.
   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> no differences.
   */