*   It is similar to a Promise in JavaScript.
 *   It allows you to register callbacks that will be executed when the computation is complete,
 *   either successfully (resolve) or with an error (reject).
 * </p>
 *
 * <p>
 *   The Deferred class has a Promise inner class that allows you to register callbacks
 *   to be executed when the computation is complete.

import static org.elasticsearch.gradle.util.GradleUtils.getProjectPathFromTask;

/**
 * Copies the files needed for the Rest YAML specs to the current projects test resources output directory.
 * This is intended to be be used from {@link RestResourcesPlugin} since the plugin wires up the needed
 * configurations and custom extensions.
 *
 * @see RestResourcesPlugin
 */
public class CopyRestApiTask extends DefaultTask {

 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *

    /*
     * In principle, a Multimap implementation could add e3 first before failing on the null. But
     * that seems unlikely enough to be worth complicating the test over, especially if there's any
     * chance that a permissive test could mask a bug.
     */
    expectUnchanged();
    // Be extra thorough in case internal state was corrupted by the expected null.
    assertEquals(new ArrayList<>(), new ArrayList<>(multimap().get(k3())));

     *
     * <p>This method handles Maven's inheritance mechanism where groupId and version
     * can be inherited from the parent POM.
     *
     * @param context the upgrade context for logging
     * @param pomDocument the POM document
     * @return the Artifact or null if it cannot be determined
     */
    public static Coordinates extractArtifactCoordinatesWithParentResolution(

     */
    protected WriterUtil() {
    }

    /**
     * Creates a {@link Writer} to output to a stream with the specified encoding.
     *
     * @param os the stream (must not be {@literal null})
     * @param encoding the encoding (must not be {@literal null} or empty)
     * @return a {@link Writer} to output to the stream
     */
    public static Writer create(final OutputStream os, final String encoding) {

 * (i.e. it requires the collection instance under test to be a certain size for the test to run).
 * Note that this means a test should not require more than one CollectionSize, since a particular
 * collection instance can only be one size at once.
 *
 * @author George van den Driessche
 */
@SuppressWarnings("rawtypes") // maybe avoidable if we rework the whole package?

 * (i.e. it requires the collection instance under test to be a certain size for the test to run).
 * Note that this means a test should not require more than one CollectionSize, since a particular
 * collection instance can only be one size at once.
 *
 * @author George van den Driessche
 */
@SuppressWarnings("rawtypes") // maybe avoidable if we rework the whole package?

    }

    /**
     * Gets the repository from which the specified version was resolved.
     *
     * @param version The version whose source repository should be retrieved, must not be {@code null}
     * @return An Optional containing the repository from which the version was resolved,
     *         or empty Optional if the repository is unknown
     */
    @Nonnull

                    final int threadId = i;
                    executor.submit(() -> {
                        try {
                            startLatch.await(); // Wait for all threads to be ready
                            for (int j = 0; j < searchersPerThread; j++) {
                                processor.register(new TestSearcher(10 + threadId * 10 + j));