UncaughtExceptionHandler uncaughtExceptionHandler) {
    this.uncaughtExceptionHandler = checkNotNull(uncaughtExceptionHandler);
    return this;
  }

  /**
   * Sets the backing {@link ThreadFactory} for new threads created with this ThreadFactory. Threads
   * will be created by invoking #newThread(Runnable) on this backing {@link ThreadFactory}.
   *

import com.google.common.annotations.J2ktIncompatible;
import com.google.common.annotations.VisibleForTesting;
import java.lang.Thread.UncaughtExceptionHandler;
import java.util.Locale;

/**
 * Factories for {@link UncaughtExceptionHandler} instances.
 *
 * @author Gregory Kick
 * @since 8.0
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault

import com.google.common.annotations.J2ktIncompatible;
import com.google.common.annotations.VisibleForTesting;
import java.lang.Thread.UncaughtExceptionHandler;
import java.util.Locale;

/**
 * Factories for {@link UncaughtExceptionHandler} instances.
 *
 * @author Gregory Kick
 * @since 8.0
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault

      new Runnable() {
        @Override
        public void run() {
          completed = true;
        }
      };

  private static final UncaughtExceptionHandler UNCAUGHT_EXCEPTION_HANDLER =
      new UncaughtExceptionHandler() {
        @Override
        public void uncaughtException(Thread t, Throwable e) {
          // No-op
        }
      };

  private ThreadFactoryBuilder builder;

  private val loggingUncaughtExceptionHandler =
    UncaughtExceptionHandler { _, throwable ->
      log.put("uncaught exception: $throwable")
    }

  private val threadFactory =
    ThreadFactory { runnable ->
      Thread(runnable, "TaskRunnerRealBackendTest").apply {
        isDaemon = true
        uncaughtExceptionHandler = loggingUncaughtExceptionHandler
      }
    }

      new Runnable() {
        @Override
        public void run() {
          completed = true;
        }
      };

  private static final UncaughtExceptionHandler UNCAUGHT_EXCEPTION_HANDLER =
      new UncaughtExceptionHandler() {
        @Override
        public void uncaughtException(Thread t, Throwable e) {
          // No-op
        }
      };

  private ThreadFactoryBuilder builder;

 *    indicating that the call was canceled. The interceptor's exception is delivered to the current
 *    thread's [uncaught exception handler][Thread.UncaughtExceptionHandler]. By default this
 *    crashes the application on Android and prints a stacktrace on the JVM. (Crash reporting
 *    libraries may customize this behavior.)
 *