*
     * @param o
     *            object to be removed from this set, if present.
     * @return true if the set contained the specified element.
     */
    @Override
    public boolean remove(final Object o) {
        return map.remove(o) == PRESENT;
    }

    /**
     * Removes all of the elements from this set.
     */
    @Override
    public void clear() {
        map.clear();

    protected int doExecute(MavenContext context, MavenExecutionRequest request) throws Exception {
        context.eventSpyDispatcher.onEvent(request);

        MavenExecutionResult result;
        try {
            result = context.maven.execute(request);
            context.eventSpyDispatcher.onEvent(result);
        } finally {
            context.eventSpyDispatcher.close();
        }

        if (result.hasExceptions()) {

 * might be absent" as two distinct types in your program, which can aid clarity.
 *
 * <p>Some uses of this class include
 *
 * <ul>
 *   <li>As a method return type, as an alternative to returning {@code null} to indicate that no
 *       value was available
 *   <li>To distinguish between "unknown" (for example, not present in a map) and "known to have no

  @MapFeature.Require(absent = SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPutIfAbsent_unsupportedPresentExistingValue() {
    try {
      assertEquals(
          "putIfAbsent(present, existingValue) should return present or throw",
          v0(),
          putIfAbsent(e0()));
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)

  @MapFeature.Require(absent = SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPutIfAbsent_unsupportedPresentExistingValue() {
    try {
      assertEquals(
          "putIfAbsent(present, existingValue) should return present or throw",
          v0(),
          getMap().putIfAbsent(k0(), v0()));
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPut_unsupportedPresentExistingValue() {
    try {
      assertEquals("put(present, existingValue) should return present or throw", v0(), put(e0()));
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)

  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testPut_unsupportedPresentExistingValue() {
    try {
      assertEquals("put(present, existingValue) should return present or throw", v0(), put(e0()));
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)

        assertEquals("Retention should be RUNTIME", RetentionPolicy.RUNTIME, retention.value());
    }

    // Test annotation target elements
    @Test
    public void test_targetElements() {
        final Target target = CustomSize.class.getAnnotation(Target.class);
        assertNotNull(target, "Target annotation should be present");

     */
    public CreateContextResponse[] getCreateContexts() {
        return this.createContexts;
    }

    /**
     * Get the lease V1 context response if present
     * @return the lease V1 context or null if not present
     */
    public LeaseV1CreateContextResponse getLeaseV1Context() {
        if (this.createContexts != null) {
            for (CreateContextResponse ctx : this.createContexts) {

        assertEquals("Retention should be RUNTIME", RetentionPolicy.RUNTIME, retention.value());
    }

    // Test annotation target elements
    @Test
    public void test_targetElements() {
        final Target target = UriType.class.getAnnotation(Target.class);
        assertNotNull(target, "Target annotation should be present");