@CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  @CollectionSize.Require(ZERO)
  public void testClear_unsupportedByEmptyCollection() {
    try {
      collection.clear();
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @CollectionFeature.Require({SUPPORTS_REMOVE, FAILS_FAST_ON_CONCURRENT_MODIFICATION})
  @CollectionSize.Require(SEVERAL)
  public void testClearConcurrentWithIteration() {

        then:
        op3 == op4

        when:
        ops.progress("foo", new OperationIdentifier(2))

        then:
        thrown(IllegalStateException)
    }

    def "missing parents are tolerated"() {
        when:
        def op = ops.start("Building", null, new OperationIdentifier(1), new OperationIdentifier(122))

        then:
        op.parent == null
    }

  @MapFeature.Require(absent = SUPPORTS_REMOVE)
  @CollectionSize.Require(ZERO)
  public void testClear_unsupportedByEmptyCollection() {
    try {
      getMap().clear();
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  public void testSetCountConditional_negativeOldCount_addUnsupported() {
    try {
      assertSetCountNegativeOldCount();
    } catch (UnsupportedOperationException tolerated) {
    }
  }

  // Incorrect expected present count.

  @CollectionFeature.Require(SUPPORTS_ADD)
  public void testSetCountConditional_oldCountTooLarge() {
    assertFalse(

  @CollectionFeature.Require(absent = SUPPORTS_ADD)
  public void testSetCountConditional_negativeOldCount_addUnsupported() {
    try {
      assertSetCountNegativeOldCount();
    } catch (UnsupportedOperationException tolerated) {
    }
  }

  // Incorrect expected present count.

  @CollectionFeature.Require(SUPPORTS_ADD)
  public void testSetCountConditional_oldCountTooLarge() {
    assertFalse(

          collection.removeIf(
              x -> {
                throw new AssertionError("predicate should never be called");
              }));
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  @CollectionSize.Require(absent = ZERO)
  public void testRemoveIf_alwaysTrueUnsupported() {
    try {

    try {
      getList().set(0, e3());
      fail("set() should throw UnsupportedOperationException or IndexOutOfBoundsException");
    } catch (UnsupportedOperationException | IndexOutOfBoundsException tolerated) {
    }
    expectUnchanged();
  }

  @CollectionSize.Require(absent = ZERO)
  @ListFeature.Require(SUPPORTS_SET)
  @CollectionFeature.Require(absent = ALLOWS_NULL_VALUES)

      getMap()
          .computeIfPresent(
              k3(),
              (k, v) -> {
                throw new AssertionFailedError();
              });
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)
  public void testComputeIfPresent_unsupportedPresent() {
    try {

	// +optional
	NodeSelector map[string]string

	// tolerations are appended (excluding duplicates) to pods running with this
	// RuntimeClass during admission, effectively unioning the set of nodes
	// tolerated by the pod and the RuntimeClass.
	// +optional
	Tolerations []core.Toleration
}

// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

// RuntimeClassList is a list of RuntimeClass objects.

    try {
      assertFalse(
          "addAll(n, nothing) should return false or throw",
          getList().addAll(0, emptyCollection()));
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX)
  public void testAddAllAtIndex_withDuplicates() {