Class<?> eventType = entry.getKey();
      Collection<Subscriber> eventMethodsInListener = entry.getValue();

      CopyOnWriteArraySet<Subscriber> eventSubscribers = subscribers.get(eventType);

      if (eventSubscribers == null) {
        CopyOnWriteArraySet<Subscriber> newSet = new CopyOnWriteArraySet<>();
        eventSubscribers =
            MoreObjects.firstNonNull(subscribers.putIfAbsent(eventType, newSet), newSet);
      }

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3

import java.io.Closeable
import java.util.concurrent.CopyOnWriteArraySet
import java.util.logging.ConsoleHandler
import java.util.logging.Handler
import java.util.logging.Level
import java.util.logging.LogRecord
import java.util.logging.Logger
import java.util.logging.SimpleFormatter

import com.google.common.collect.testing.features.ListFeature;
import java.lang.reflect.Method;
import java.util.List;
import java.util.ListIterator;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArraySet;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;
import org.junit.Ignore;

/**
 * A generic JUnit test which tests {@code listIterator} operations on a list. Can't be invoked

import com.google.common.collect.testing.features.ListFeature;
import java.lang.reflect.Method;
import java.util.List;
import java.util.ListIterator;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArraySet;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;
import org.junit.Ignore;

/**
 * A generic JUnit test which tests {@code listIterator} operations on a list. Can't be invoked

            new TestStringSetGenerator() {
              @Override
              public Set<String> create(String[] elements) {
                return new CopyOnWriteArraySet<>(MinimalCollection.of(elements));
              }
            })
        .named("CopyOnWriteArraySet")
        .withFeatures(
            CollectionFeature.SUPPORTS_ADD,
            CollectionFeature.SUPPORTS_REMOVE,
            CollectionFeature.SERIALIZABLE,

    /**
     * Creates and returns a new instance of {@link CopyOnWriteArraySet}.
     *
     * @param <E> the element type of {@link CopyOnWriteArraySet}
     * @return a new instance of {@link CopyOnWriteArraySet}
     * @see CopyOnWriteArraySet#CopyOnWriteArraySet()
     */
    public static <E> CopyOnWriteArraySet<E> newCopyOnWriteArraySet() {
        return new CopyOnWriteArraySet<>();
    }

    /**

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.platform.android

import android.util.Log
import java.util.concurrent.CopyOnWriteArraySet
import java.util.logging.Handler
import java.util.logging.Level
import java.util.logging.LogRecord
import java.util.logging.Logger
import okhttp3.OkHttpClient
import okhttp3.internal.SuppressSignatureCheck

       */
      /*
       * A CopyOnWriteArraySet<WeakReference> is faster than a newSetFromMap of a MapMaker map with
       * weakKeys() and concurrencyLevel(1), even up to at least 12 cached exception types.
       */
      private static final Set<WeakReference<Class<? extends Exception>>> validClasses =
          new CopyOnWriteArraySet<>();

      @Override

            new TestStringSetGenerator() {
              @Override
              public Set<String> create(String[] elements) {
                return new CopyOnWriteArraySet<>(MinimalCollection.of(elements));
              }
            })
        .named("CopyOnWriteArraySet")
        .withFeatures(
            CollectionFeature.SUPPORTS_ADD,
            CollectionFeature.SUPPORTS_REMOVE,
            CollectionFeature.SERIALIZABLE,

       */
      /*
       * A CopyOnWriteArraySet<WeakReference> is faster than a newSetFromMap of a MapMaker map with
       * weakKeys() and concurrencyLevel(1), even up to at least 12 cached exception types.
       */
      private static final Set<WeakReference<Class<? extends Exception>>> validClasses =
          new CopyOnWriteArraySet<>();

      @Override