protected Set<Integer> highlightTerminalCharSet = new HashSet<>();

    /** Action hook for custom processing */
    protected ActionHook actionHook = new ActionHook();

    /** Set of MIME types that should be displayed inline */
    protected final Set<String> inlineMimeTypeSet = new HashSet<>();

    /** Cache for facet responses */
    protected Cache<String, FacetResponse> facetCache;

- Fixed a bug that prevents kubectl to validate CRDs with schema using x-kubernetes-preserve-unknown-fields on object fields.
  Fix kubectl SchemaError on CRDs with schema using x-kubernetes-preserve-unknown-fields on array types. ([#96562](https://github.com/kubernetes/kubernetes/pull/96562), [@gautierdelorme](https://github.com/gautierdelorme)) [SIG API Machinery and Testing]

labels.login_required=Login Required
labels.result_collapsed=Collapse Duplicate Results
labels.login_link=Show Login Link
labels.thumbnail=Show Thumbnail
labels.ignore_failure_type=Ignore Failure Types
labels.failure_count_threshold=Failure Count Threshold
labels.popular_word_word_enabled=Popular Word Response
labels.supported_search_web=Web
labels.supported_search_none=Unavailable

    protected RobotsTxtHelper robotsTxtHelper;

    /** Helper for managing content length limits */
    @Resource
    protected ContentLengthHelper contentLengthHelper;

    /** Helper for determining MIME types */
    @Resource
    protected MimeTypeHelper mimeTypeHelper;

    /** The HTTP client instance */
    protected volatile CloseableHttpClient httpClient;

- `PodSchedulingReadiness` is graduated to beta. ([#115815](https://github.com/kubernetes/kubernetes/pull/115815), [@Huang-Wei](https://github.com/Huang-Wei))
- `PodSpec.Container.Resources` became mutable for CPU and memory resource types.
  - `PodSpec.Container.ResizePolicy` (new object) gives users control over how their containers are resized.
  - `PodStatus.Resize` status describes the state of a requested Pod resize.

- Coordination.v1alpha1 API is dropped and replaced with coordination.v1alpha2. Old coordination.v1alpha1 types must be deleted before upgrade ([#127857](https://github.com/kubernetes/kubernetes/pull/127857), [@Jefftree](https://github.com/Jefftree)) [SIG API Machinery, Etcd, Scheduling and Testing]

- Aggregated discovery supports both `v2beta1` and v2 types and feature is promoted to GA. ([#122882](https://github.com/kubernetes/kubernetes/pull/122882), [@Jefftree](https://github.com/Jefftree))

    a = Arrays.<@Nullable Integer>asList(4, 8, null, 16, 23, 42);
    b = Arrays.<@Nullable Integer>asList(4, 8, null, 16, 23, 42);
    assertTrue(elementsEqual(a.iterator(), b.iterator()));

    // Different Iterable types (still equal elements, though).
    a = ImmutableList.of(4, 8, 15, 16, 23, 42);
    b = asList(4, 8, 15, 16, 23, 42);
    assertTrue(elementsEqual(a.iterator(), b.iterator()));

    // An element differs.

- Fixes issue where you can't attach more than 15 GCE Persistent Disks to c2, n2, m1, m2 machine types. ([#88602](https://github.com/kubernetes/kubernetes/pull/88602), [@yuga711](https://github.com/yuga711)) [SIG Storage]

import org.codelibs.core.exception.IORuntimeException;
import org.codelibs.core.net.URLUtil;
import org.codelibs.core.nio.ChannelUtil;

/**
 * Utility for copying.
 * <p>
 * The combinations of input and output types and the unit of elements copied are as follows:
 * </p>
 * <table border="1">
 * <caption>Elements for copying instances</caption>
 * <tr>
 * <th rowspan="2">Input type</th>
 * <th colspan="4">Output type</th>
 * </tr>