}

    // 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)

package okhttp3

import javax.net.ssl.HostnameVerifier
import javax.net.ssl.SSLSession

class RecordingHostnameVerifier : HostnameVerifier {
  @JvmField
  val calls: MutableList<String> = mutableListOf()

  @Synchronized override fun verify(
    hostname: String,
    session: SSLSession,
  ): Boolean {
    calls.add("verify $hostname")
    return true
  }

    Multimap<K, V> multimap = synchronizedMultimap(HashMultimap.<K, V>create());
    Collection<V> values = multimap.get(key); // Needn't be in synchronized block
    synchronized (multimap) { // Synchronizing on multimap, not values!
      Iterator<V> i = values.iterator(); // Must be in synchronized block
      while (i.hasNext()) {
        foo(i.next());
      }
    }
  }

  private static void foo(Object unused) {}

     *
     * @param text the text containing URLs
     * @return the text with replaced URLs
     */
    public String replaceUrls(final String text) {
        if (cachedPathMappingList == null) {
            synchronized (this) {
                if (cachedPathMappingList == null) {
                    init();
                }
            }
        }
        String result = text;

      delegate.clear();
    }

    @Override
    public Collection<V> values() {
      assertTrue(Thread.holdsLock(mutex));
      /* TODO: verify that the Collection is also synchronized? */
      return delegate.values();
    }

    @Override
    public Set<Cell<R, C, V>> cellSet() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.cellSet();
    }

    @Override

        lock = new Object();
    }

    @Override
    public int read() throws IOException {
        int result = -1;

        synchronized (lock) {
            try {
                while (used == 0) {
                    lock.wait();
                }
            } catch (final InterruptedException ie) {

     * this metho again will have no effect.
     *
     * @param a the authenticator to set as default
     */

    public synchronized static void setDefault(final NtlmAuthenticator a) {
        if (auth != null) {
            return;
        }
        auth = a;
    }

    /**
     * Gets the default NTLM authenticator.

            }
        }
        obj = getCachedAddress(name);
        if (obj == null) {
            synchronized (LOOKUP_TABLE) {
                LOOKUP_TABLE.put(name, name);
            }
        }

        return obj;
    }

    private static void updateLookupTable(final Name name) {
        synchronized (LOOKUP_TABLE) {
            LOOKUP_TABLE.remove(name);
            LOOKUP_TABLE.notifyAll();
        }

            throw this.e;
        }
    }

    synchronized void write(final byte[] buffer, final int len, final SmbFileOutputStream d) {
        this.b = buffer;
        this.n = len;
        this.out = d;
        this.ready = false;
        notify();
    }

    @Override
    public void run() {
        synchronized (this) {
            try {
                for (;;) {

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