- Ingress:
  - `spec.ingressClassName` replaces the deprecated `kubernetes.io/ingress.class` annotation, and allows associating an Ingress object with a particular controller.

     * Newline characters in the output are automatically replaced with spaces.
     *
     * @param newOutput the new output sequence to set
     */
    public void setNewOutput(final String newOutput) {
        this.newOutput = newOutput == null ? null : newOutput.replace("\n", " ");
    }

    /**

    map.put(one, three);
    assertNotified(listener, one, two, RemovalCause.REPLACED);

    Map<Object, Object> newMap = ImmutableMap.of(one, four);
    map.putAll(newMap);
    assertNotified(listener, one, three, RemovalCause.REPLACED);

    map.replace(one, five);
    assertNotified(listener, one, four, RemovalCause.REPLACED);

    map.replace(one, five, six);
    assertNotified(listener, one, five, RemovalCause.REPLACED);

    }

    /**
     * Sets the placeholder string used in regex-based related content templates.
     * This placeholder is replaced with the actual search query when
     * a regex pattern matches the query.
     *
     * @param queryPlaceHolder the placeholder string to be replaced with the query (default: "__QUERY__")
     */
    public void setQueryPlaceHolder(final String queryPlaceHolder) {

    cache.put(10, 100);
    cache.put(2, 52);

    asMap.replace(2, 79);
    asMap.replace(3, 60);

    assertEquals(null, cache.getIfPresent(3));
    assertEquals(null, asMap.get(3));

    assertEquals(Integer.valueOf(79), cache.getIfPresent(2));
    assertEquals(Integer.valueOf(79), asMap.get(2));

    asMap.replace(10, 100, 50);
    asMap.replace(2, 52, 99);

    }
    return false;
  }

  @Override
  public boolean replace(K key, V oldValue, V newValue) {
    if (oldValue.equals(get(key))) {
      alertListenerIfPresent(key, oldValue, RemovalCause.REPLACED);
      put(key, newValue);
      return true;
    }
    return false;
  }

  @Override
  public V replace(K key, V value) {
    V currentValue = get(key);
    if (currentValue != null) {

     * where '*' is replaced with '.*' for pattern matching, and stored case-insensitively.
     *
     * @param directive The directive to add to the robots.txt rules
     */
    public void addDirective(final Directive directive) {
        directiveMap.put(Pattern.compile(directive.getUserAgent().replace("*", ".*"), Pattern.CASE_INSENSITIVE), directive);
    }

    /**

Other notable changes include:
* CoreDNS replaces kube-dns as the default DNS provider
* Improved user experience for environments without a public internet connection and users using other CRI runtimes than Docker

     */
    open fun url(url: URL) = url(url.toString().toHttpUrl())

    /**
     * Sets the header named [name] to [value]. If this request already has any headers
     * with that name, they are all replaced.
     */
    open fun header(
      name: String,
      value: String,
    ) = apply {
      headers[name] = value
    }

    /**

       * as a compromise, we enable the optimization only on platforms that we specifically know to
       * work.
       *
       * In the future, the use of Unsafe.getLong() should be replaced by ByteBuffer.getLong(),
       * which will have an efficient native implementation in JDK 9.
       *
       */
      String arch = System.getProperty("os.arch");