return null;
        }
        if (list.size() >= 2) {
            String msg = "The size of selected list is over 1: " + list.size();
            throw new FetchingOverSafetySizeException(msg, 1); // immediately caught by caller and translated
        }
        return list.get(0);
    }

    @Override

    static <K, V> PopulatableMapAsMultimap<K, V> create() {
      return new PopulatableMapAsMultimap<>();
    }

    @SuppressWarnings("unchecked") // all methods throw immediately
    PopulatableMapAsMultimap() {
      this.map = new HashMap<>();
      this.unusableDelegate =
          (SetMultimap<K, V>)
              newProxy(
                  SetMultimap.class,

   * called multiple times.
   *
   * <p>If {@link #stopAsync} is called on a {@link State#STARTING} service, this method is not
   * invoked immediately. Instead, it will be deferred until after the service is {@link
   * State#RUNNING}. Services that need to cancel startup work can override {@link #doCancelStart}.
   */
  @ForOverride
  protected abstract void doStop();

    /**
     * File being created or opened must not be a directory
     */
    public static final int FILE_NON_DIRECTORY_FILE = 0x40;
    /**
     * Complete this operation immediately with an oplock break if it would break an oplock
     */
    public static final int FILE_COMPLETE_IF_OPLOCKED = 0x100;
    /**
     * The client does not understand extended attributes
     */

     * course of a call to {@code remove()}. Thus, the expectation doesn't hold that {@code
     * map.remove(x)} returns the same value which {@code map.get(x)} did immediately beforehand.
     */
    @Override
    public void testRemove() {
      Map<String, Map<Integer, Character>> map;
      try {
        map = makePopulatedMap();
      } catch (UnsupportedOperationException e) {

     * course of a call to {@code remove()}. Thus, the expectation doesn't hold that {@code
     * map.remove(x)} returns the same value which {@code map.get(x)} did immediately beforehand.
     */
    @Override
    public void testRemove() {
      Map<String, Map<Integer, Character>> map;
      try {
        map = makePopulatedMap();
      } catch (UnsupportedOperationException e) {

            // Test odd Unicode alignment - headerStart affects alignment
            int bytesWritten = testBlock.writeString(testString, buffer, 2);

            // When even alignment (offset 2), Unicode string starts immediately
            assertTrue(bytesWritten >= 8); // "Test" in Unicode + null terminator
            // First byte should be 'T' in UTF-16LE
            assertEquals(0x54, buffer[2] & 0xFF);
        }

        @Test

   *   <li>If {@code x} is positive or negative zero, the result is negative infinity.
   * </ul>
   *
   * <p>The computed result is within 1 ulp of the exact result.
   *
   * <p>If the result of this method will be immediately rounded to an {@code int}, {@link
   * #log2(double, RoundingMode)} is faster.
   */
  public static double log2(double x) {
    return log(x) / LN_2; // surprisingly within 1 ulp according to tests
  }

        });
    assertThat(orig.toString())
        .contains("Exception thrown from implementation: class java.lang.StackOverflowError");
  }

  // Regression test for a case where we would fail to execute listeners immediately on done futures
  // this would be observable from an afterDone callback
  public void testListenersExecuteImmediately_fromAfterDone() {
    AbstractFuture<String> f =
        new AbstractFuture<String>() {

			objectName:     "foodir/fooobject",
			objectModTime:  time.Now().UTC().Add(-10 * 24 * time.Hour), // Created 10 days ago
			isDelMarker:    true,
			expectedAction: DeleteVersionAction,
		},
		// Should transition immediately when Transition days is zero
		{