Spliterator<OutElementT> flatMap(
          Spliterator<InElementT> fromSpliterator,
          Function<? super InElementT, @Nullable Spliterator<OutElementT>> function,
          int topCharacteristics,
          long topSize) {
    checkArgument(
        (topCharacteristics & Spliterator.SUBSIZED) == 0,
        "flatMap does not support SUBSIZED characteristic");
    checkArgument(

    concatenated.close();
    assertThat(closeCountB.get()).isEqualTo(1);
  }

  public void testConcat_refStream_closeIsPropagated_Stream_flatMap() {
    // Just to demonstrate behavior of Stream::flatMap in the standard library
    AtomicInteger closeCountB = new AtomicInteger(0);
    Stream<String> streamB = Stream.of("b").onClose(closeCountB::incrementAndGet);
    Stream<String> concatenated =

            task.getVersion().convention(project.provider(() -> project.getVersion().toString()));
            task.getSourceFile().convention(dslDocbook.flatMap(AssembleDslDocTask::getDestFile));
            task.getLinksFile().convention(dslDocbook.flatMap(AssembleDslDocTask::getLinksFile));

            task.getDsldocUrl().convention("../dsl");
            task.getJavadocUrl().convention("../javadoc");

                )
            }
        }

        val firScopes = towerDataElementsIndexed.flatMap { (index, towerDataElement) ->
            val availableScopes = towerDataElement
                .getAvailableScopes { coneType -> withSyntheticPropertiesScopeOrSelf(coneType) }
                .flatMap { flattenFirScope(it) }
            availableScopes.map { IndexedValue(index, it) }
        }

    reportTask {
        sources.from(kotlinMainSourceSet.sourceDirectories)
    }
}

tasks.named("check") { dependsOn(reportTask) }

consumableVariant("txt", reportTask.flatMap { it.textReportFile })
consumableVariant("html", reportTask.flatMap { it.htmlReportFile })

fun consumableVariant(reportType: String, artifact: Provider<RegularFile>) = configurations.create("incubatingReport${reportType.capitalize()}") {
    isVisible = false

        isolatedClassLoaderFor(classpath).use { loader ->
            javaProjectBuilderFor(loader)
                .sequenceOfJavaSourcesFrom(sources)
                .flatMap { it.classes.asSequence().filter { it.isPublic } }
                .flatMap { it.methods.asSequence().filter { it.isPublic && it.parameterTypes.isNotEmpty() } }
                .map { method -> fullyQualifiedSignatureOf(method) to commaSeparatedParameterNamesOf(method) }

        get() = PerformanceTestType.adHoc

    override
    val failsStage: Boolean
        get() = false

    val buildSpecs: List<FlameGraphGenerationBuildSpec>
        get() = scenarios.flatMap { scenario ->
            Os.values().flatMap { os ->
                if (os == Os.WINDOWS) {
                    listOf("jprofiler")
                } else {
                    listOf("async-profiler", "async-profiler-heap")

            task.setGroup("release notes");
            task.setDescription("Transforms generated release notes.");

            task.getHtmlFile().convention(releaseNotesMarkdown.flatMap(RenderMarkdown::getDestinationFile));
            task.getBaseCssFile().convention(extension.getReleaseNotes().getBaseCssFile());
            task.getReleaseNotesCssFile().convention(extension.getReleaseNotes().getReleaseNotesCssFile());

    @Suppress("unused")
    @JvmStatic
    fun connectionTypes(): List<SocketMode> =
      listOf(CONSCRYPT, JSSE).flatMap { provider ->
        listOf(HTTP_1_1, HTTP_2).flatMap { protocol ->
          listOf(TLS_1_3, TLS_1_2).flatMap { tlsVersion ->
            listOf(Channel, Standard).flatMap { socketMode ->
              listOf(DISABLED, STANDARD).map { tlsExtensionMode ->

        val declarationGenerators = session.extensionService.declarationGenerators

        val generatedTopLevelClassifiers = declarationGenerators
            .asSequence()
            .flatMap {
                // FIXME this function should be called only once during plugin's lifetime, so this usage is not really correct (2)
                it.getTopLevelClassIds()
            }