.build();
  }

  private static Iterable<Striped<?>> allImplementations() {
    return concat(strongImplementations(), weakImplementations());
  }

  public void testNull() throws Exception {
    for (Striped<?> striped : allImplementations()) {
      new NullPointerTester().testAllPublicInstanceMethods(striped);
    }
  }

  public void testSizes() {

     */
    @Nonnull
    Optional<ClassLoader> currentThreadClassLoader();

    /**
     * Performs a clean shutdown of backing container.
     */
    @Override
    void close() throws Exception;

package org.apache.maven.artifact.resolver;

import java.util.ArrayList;
import java.util.List;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.repository.ArtifactRepository;

/**
 * Exception caused when one or more artifacts can not be resolved because they are not found in the
 * local or remote repositories.
 */
public class MultipleArtifactsNotFoundException extends ArtifactResolutionException {

    public AbstractConflictResolverTest(String roleHint) throws Exception {
        this.roleHint = roleHint;
    }

    // TestCase methods -------------------------------------------------------

    /*
     * @see junit.framework.TestCase#setUp()
     */
    @BeforeEach
    public void setUp() throws Exception {
        conflictResolver = (ConflictResolver) container.lookup(ConflictResolver.ROLE, roleHint);

  private final OkHttpClient client = new OkHttpClient();

  public void run() throws Exception {
    RequestBody requestBody = new RequestBody() {
      @Override public MediaType contentType() {
        return MEDIA_TYPE_MARKDOWN;
      }

      @Override public void writeTo(BufferedSink sink) throws IOException {
        sink.writeUtf8("Numbers\n");
        sink.writeUtf8("-------\n");

        assertEquals("url cannot be null", e.getMessage());
    }

    @Test
    void testGetInputStream() throws Exception {
        URL txtFile = new File("target/test-classes/source.txt").toURI().toURL();
        UrlSource source = new UrlSource(txtFile);
        try (InputStream is = source.getInputStream();

            ArtifactVersion version2 = node2.getArtifact().getSelectedVersion();

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

            return null;
        }
    }

  }

  /*
   * Tests for Predicates.alwaysFalse().
   */

  public void testAlwaysFalse_apply() throws Exception {
    assertEvalsToFalse(Predicates.alwaysFalse());
  }

  public void testAlwaysFalse_equality() throws Exception {
    new EqualsTester()
        .addEqualityGroup(FALSE, Predicates.alwaysFalse())
        .addEqualityGroup(isOdd())

    Collection<String> set = new LinkedHashSet<>();
    Collections.addAll(set, "a", "b", "c");
    FluentIterable<String> tail = FluentIterable.from(set).skip(2);
    set.remove("a");
    set.remove("b");
    assertFalse(tail.iterator().hasNext());
  }

  public void testSkip_structurallyModifiedSkipAllList() throws Exception {
    List<String> list = Lists.newArrayList("a", "b", "c");

   *
   * <p>There is no guaranteed ordering of execution of listeners, but any listener added through
   * this method is guaranteed to be called once the computation is complete.
   *
   * <p>Exceptions thrown by a listener will be propagated up to the executor. Any exception thrown
   * during {@code Executor.execute} (e.g., a {@code RejectedExecutionException} or an exception