*     constructor that omits the cause.
   */
  @Deprecated
  protected UncheckedExecutionException() {}

  /**
   * Creates a new instance with the given detail message and no cause.
   *
   * @deprecated Prefer {@linkplain UncheckedExecutionException(String, Throwable)} a constructor
   *     that accepts a cause: Users of this class typically expect for instances to have a non-null

          }

          @Override
          public @Nullable Object getIfPresent(Object key) {
            return valueRef.get();
          }
        };

    UncheckedExecutionException expected =
        assertThrows(UncheckedExecutionException.class, () -> cache.getUnchecked(new Object()));
    assertThat(expected).hasCauseThat().isEqualTo(cause);

    Object newValue = new Object();
    valueRef.set(newValue);

  }

  public void testCallWithTimeout_wrapsUncheckedException() throws Exception {
    Exception exception = new RuntimeException("test");
    UncheckedExecutionException e =
        assertThrows(
            UncheckedExecutionException.class,
            () -> timeLimiter.callWithTimeout(callableThrowing(exception), DELAY_MS, MILLISECONDS));
    assertThat(e.getCause()).isEqualTo(exception);
  }

          }

          @Override
          public @Nullable Object getIfPresent(Object key) {
            return valueRef.get();
          }
        };

    UncheckedExecutionException expected =
        assertThrows(UncheckedExecutionException.class, () -> cache.getUnchecked(new Object()));
    assertThat(expected).hasCauseThat().isEqualTo(cause);

    Object newValue = new Object();
    valueRef.set(newValue);

  }

  public void testCallWithTimeout_wrapsUncheckedException() throws Exception {
    Exception exception = new RuntimeException("test");
    UncheckedExecutionException e =
        assertThrows(
            UncheckedExecutionException.class,
            () -> timeLimiter.callWithTimeout(callableThrowing(exception), DELAY_MS, MILLISECONDS));
    assertThat(e.getCause()).isEqualTo(exception);
  }

  public void testGetUnchecked_executionExceptionChecked() {
    UncheckedExecutionException expected =
        assertThrows(
            UncheckedExecutionException.class, () -> getUnchecked(FAILED_FUTURE_CHECKED_EXCEPTION));
    assertEquals(CHECKED_EXCEPTION, expected.getCause());
  }

  public void testGetUnchecked_executionExceptionUnchecked() {
    UncheckedExecutionException expected =
        assertThrows(

  public void testGetUnchecked_executionExceptionChecked() {
    UncheckedExecutionException expected =
        assertThrows(
            UncheckedExecutionException.class, () -> getUnchecked(FAILED_FUTURE_CHECKED_EXCEPTION));
    assertEquals(CHECKED_EXCEPTION, expected.getCause());
  }

  public void testGetUnchecked_executionExceptionUnchecked() {
    UncheckedExecutionException expected =
        assertThrows(

          .put(RuntimeException.class, e -> e instanceof RuntimeException)
          .put(TimeoutException.class, e -> e instanceof TimeoutException)
          .put(UncheckedExecutionException.class, e -> e instanceof UncheckedExecutionException)
          .put(UnsupportedCharsetException.class, e -> e instanceof UnsupportedCharsetException)
          .put(UnsupportedOperationException.class, e -> e instanceof UnsupportedOperationException)

   * @throws InterruptedException if the current thread was interrupted during execution
   * @throws ExecutionException if {@code callable} throws a checked exception
   * @throws UncheckedExecutionException if {@code callable} throws a {@code RuntimeException}
   * @throws ExecutionError if {@code callable} throws an {@code Error}
   * @since 22.0
   */

        () -> service.runWithTimeout(GOOD_RUNNABLE, NOT_ENOUGH_MS, MILLISECONDS));
  }

  public void testRunWithTimeout_badRunnableWithEnoughTime() throws Exception {
    UncheckedExecutionException expected =
        assertThrows(
            UncheckedExecutionException.class,
            () -> service.runWithTimeout(BAD_RUNNABLE, ENOUGH_MS, MILLISECONDS));
    assertThat(expected.getCause()).isInstanceOf(SampleRuntimeException.class);
  }