largeElementSplitFunction: (T, Int) -> List<R>,
    smallElementAggregateFunction: (List<T>) -> R,
    expectedBucketNumber: Int,
    maxNumberInBucket: Int,
    noElementSplitFunction: (Int) -> List<R> = { throw IllegalArgumentException("More buckets than things to split") },
    canRunTogether: (T, T) -> Boolean = { _, _ -> true },
): List<R> {
    if (list.isEmpty()) {
        return noElementSplitFunction(expectedBucketNumber)

                                + requiredMavenVersion,
                        e);
                return;
            }
            if (!isRequirementMet) {
                throw new IllegalStateException("Required Maven version " + requiredMavenVersion
                        + " is not met by current version " + runtimeInformation.getMavenVersion());
            }
        }
    }

    public boolean isCollection() {
        return false;
    }

    @Override
    public boolean isLeaf() {
        return true;
    }

    @Override
    public void setValue(Object value) {
        throw new UnsupportedOperationException();
    }

            return version1.compareTo(version2) > 0 ? node1 : node2;
        } catch (OverConstrainedVersionException exception) {
            // TODO log message or throw exception?

            return null;
        }
    }

    public PluginDescriptor get(Key cacheKey) {
        return clone(descriptors.get(cacheKey));
    }

    @Override
    public PluginDescriptor get(Key key, PluginDescriptorSupplier supplier)
            throws PluginDescriptorParsingException, PluginResolutionException, InvalidPluginDescriptorException {

        PluginDescriptor desc = descriptors.get(key);
        if (desc == null) {
            synchronized (key) {

    }

    @Override
    public Map<String, List<MojoExecution>> calculateLifecycleMappings(
            MavenSession session, MavenProject project, Lifecycle lifecycle, String lifecyclePhase)
            throws PluginNotFoundException, PluginResolutionException, PluginDescriptorParsingException,
                    MojoNotFoundException, InvalidPluginDescriptorException {
        /*

        message.append(resource.getRepositoryUrl()).append(resource.getResourceName());

        out.info(message.toString());
    }

    @Override
    public void transferCorrupted(TransferEvent event) throws TransferCancelledException {
        TransferResource resource = event.getResource();
        out.warn(
                "{} from {} for {}{}",
                event.getException().getMessage(),

    public int run(
            String[] args,
            @Nullable InputStream stdIn,
            @Nullable OutputStream stdOut,
            @Nullable OutputStream stdErr,
            boolean embedded)
            throws IOException {
        try (Invoker invoker = createInvoker()) {
            return invoker.invoke(createParser()
                    .parseInvocation(createParserRequestBuilder(args)
                            .stdIn(stdIn)

import org.apache.maven.project.MavenProject;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;

class ConcurrencyDependencyGraphTest {

    @Test
    void testGraph() throws Exception {

        ProjectBuildList projectBuildList =
                ProjectDependencyGraphStub.getProjectBuildList(ProjectDependencyGraphStub.getMavenSession());

     * Creates a new {@link DependencyCoordinates} object from the request.
     *
     * @param request the request containing the various data
     * @return a new {@link DependencyCoordinates} object
     *
     * @throws IllegalArgumentException if {@code request} is null or
     *         if {@code request.getSession()} is null or invalid
     */
    @Nonnull
    DependencyCoordinates create(@Nonnull DependencyCoordinatesFactoryRequest request);