else -> it
            }
        }

    private
    fun Parameters.buildReceiptString(): String? = when {
        ignoreIncomingBuildReceipt.get() -> null
        else -> buildReceiptFileContents.orNull
    }

  @Override
  @CheckForNull
  public <A extends Annotation> A getDeclaredAnnotation(Class<A> annotationType) {
    checkNotNull(annotationType);
    return FluentIterable.from(annotations).filter(annotationType).first().orNull();
  }

  /**
   * @since 18.0
   */
  @Override
  public <A extends Annotation> A[] getDeclaredAnnotationsByType(Class<A> annotationType) {
    @Nullable

  }

  @SuppressWarnings("OptionalOfRedundantMethod") // Unit tests for Optional
  public void testOrNull_present() {
    assertEquals("a", Optional.of("a").orNull());
  }

  public void testOrNull_absent() {
    assertNull(Optional.absent().orNull());
  }

  public void testAsSet_present() {
    Set<String> expected = Collections.singleton("a");
    assertEquals(expected, Optional.of("a").asSet());
  }

    private
    val JApiClass.kotlinSourceFilePath: String
        get() = "$packagePath/$bytecodeSourceFilename"

    private
    val JApiClass.bytecodeSourceFilename: String
        get() = newClass.orNull()?.classFile?.getAttribute("SourceFile")?.let { it as? SourceFileAttribute }?.fileName
            ?: throw java.lang.IllegalStateException("Bytecode for $fullyQualifiedName is missing the 'SourceFile' attribute")

  }

  @SuppressWarnings("OptionalOfRedundantMethod") // Unit tests for Optional
  public void testOrNull_present() {
    assertEquals("a", Optional.of("a").orNull());
  }

  public void testOrNull_absent() {
    assertNull(Optional.absent().orNull());
  }

  public void testAsSet_present() {
    Set<String> expected = Collections.singleton("a");
    assertEquals(expected, Optional.of("a").asSet());
  }

        description = "Runs the cross-version tests against a subset of selected Gradle versions with 'forking' executer for quick feedback"
    }

    val releasedVersions = moduleIdentity.releasedVersions.orNull
    releasedVersions?.allTestedVersions?.forEach { targetVersion ->
        val crossVersionTest = createTestTask("gradle${targetVersion.version}CrossVersionTest", "forking", sourceSet, TestType.CROSSVERSION) {

    get() = providers.gradleProperty("buildCommitDistribution").map { it.toBoolean() }.orElse(false).get()


fun Project.isInBuild(vararg buildTypeIds: String) = providers.environmentVariable("BUILD_TYPE_ID").orNull?.let { currentBuildTypeId ->
    buildTypeIds.any { currentBuildTypeId.endsWith(it) }

      new Function<Optional<?>, @Nullable Object>() {
        @Override
        public @Nullable Object apply(Optional<?> optional) {
          return optional.orNull();
        }
      };

  /**
   * Sets.cartesianProduct doesn't allow sets that contain null, but we want null to mean "don't

      new Function<Optional<?>, @Nullable Object>() {
        @Override
        public @Nullable Object apply(Optional<?> optional) {
          return optional.orNull();
        }
      };

  /**
   * Sets.cartesianProduct doesn't allow sets that contain null, but we want null to mean "don't

    jvmArgumentProviders.add(CiEnvironmentProvider(this))
    val launcher = project.javaToolchains.launcherFor {
        languageVersion = jvmVersionForTest()
        vendor = project.testJavaVendor.orNull
    }
    javaLauncher = launcher
    if (jvmVersionForTest().canCompileOrRun(9)) {
        if (isUnitTest() || usesEmbeddedExecuter()) {