public DefaultModelBuildingRequest setPomFile(File pomFile) {
        this.pomFile = (pomFile != null) ? pomFile.getAbsoluteFile() : null;

        return this;
    }

    @Override
    public synchronized ModelSource getModelSource() {
        if (modelSource == null && pomFile != null) {
            modelSource = new FileModelSource(pomFile);
        }
        return modelSource;
    }

    @Override

   */
  public static TesterRequirements getTesterRequirements(Class<?> testerClass)
      throws ConflictingRequirementsException {
    synchronized (classTesterRequirementsCache) {
      TesterRequirements requirements = classTesterRequirementsCache.get(testerClass);
      if (requirements == null) {
        requirements = buildTesterRequirements(testerClass);

    }

    // gather artifactIds which are not unique so that the respective thread names can be extended with the groupId
    public Set<String> duplicateIds() {
        if (duplicateIds == null) {
            synchronized (this) {
                if (duplicateIds == null) {
                    duplicateIds = projects()
                            .map(MavenProject::getArtifactId)

     * The ingester is inserted into the collection and the array is re-sorted by priority.
     * This method is thread-safe.
     *
     * @param ingester the ingester to add
     */
    public synchronized void add(final Ingester ingester) {
        if (logger.isDebugEnabled()) {
            logger.debug("Loaded Ingester: {}", ingester.getClass().getSimpleName());
        }

        DcerpcHandle handle = null;
        LsaPolicyHandle policyHandle = null;

        synchronized (sid_cache) {
            try {
                handle = DcerpcHandle.getHandle("ncacn_np:" + authorityServerName + "[\\PIPE\\lsarpc]", auth);
                String server = authorityServerName;

import org.jspecify.annotations.Nullable;

/**
 * Tests for {@link Synchronized#deque} and {@link Queues#synchronizedDeque}.
 *
 * @author Kurt Alfred Kluever
 */
@NullUnmarked
public class SynchronizedDequeTest extends TestCase {

  protected Deque<String> create() {
    TestDeque<String> inner = new TestDeque<>();
    Deque<String> outer = Synchronized.deque(inner, inner.mutex);

            }
            final MsrpcSamrConnect2 rpc2 = new MsrpcSamrConnect2(server, access, this);
            handle.sendrecv(rpc2);
        }
        this.opened = true;
    }

    @Override
    public synchronized void close() throws IOException {
        if (this.opened) {
            this.opened = false;
            final samr.SamrCloseHandle rpc = new MsrpcSamrCloseHandle(this);
            this.handle.sendrecv(rpc);

        this.delegates = delegates;
        this.coreArtifacts = coreExports.getExportedArtifacts();
    }

    private synchronized Set<String> getExcludedArtifacts() {
        if (excludedArtifacts == null) {
            excludedArtifacts = new LinkedHashSet<>(coreArtifacts);
        }
        return excludedArtifacts;
    }

    /**

     * That may introduce an extra class for each lambda (currently a dozen).
     */
    Logger local = logger;
    if (local != null) {
      return local;
    }
    synchronized (lock) {
      local = logger;
      if (local != null) {
        return local;
      }
      return logger = Logger.getLogger(loggerName);
    }
  }

    int readDataWireFormat(final byte[] buffer, final int bufferIndex, final int len) {
        if (pipe.pipeIn != null) {
            final TransactNamedPipeInputStream in = (TransactNamedPipeInputStream) pipe.pipeIn;
            synchronized (in.lock) {
                in.receive(buffer, bufferIndex, len);
                in.lock.notify();
            }
        }
        return len;
    }

    @Override
    public String toString() {