### Kompakt

Es gibt für alles sensible **Defaultwerte**, mit optionaler Konfiguration überall. Alle Parameter können feinjustiert werden, damit sie tun, was Sie benötigen, und die API definieren, die Sie brauchen.

Aber standardmäßig **„funktioniert einfach alles“**.

### Validierung

* Validierung für die meisten (oder alle?) Python-**Datentypen**, hierzu gehören:

import org.opentest4j.TestAbortedException

/**
 * Marks a test as Platform aware, before the test runs a consistent Platform will be
 * established e.g. SecurityProvider for Conscrypt installed.
 *
 * Also allows a test file to state general platform assumptions, or for individual test.
 */
@Suppress("unused", "MemberVisibilityCanBePrivate")
open class PlatformRule
  @JvmOverloads
  constructor(

HTTP is the way modern applications network. It’s how we exchange data & media. Doing HTTP
efficiently makes your stuff load faster and saves bandwidth.

OkHttp is an HTTP client that’s efficient by default:

 * HTTP/2 support allows all requests to the same host to share a socket.
 * Connection pooling reduces request latency (if HTTP/2 isn’t available).
 * Transparent GZIP shrinks download sizes.

## An app with callbacks { #an-app-with-callbacks }

Let's see all this with an example.

Imagine you develop an app that allows creating invoices.

These invoices will have an `id`, `title` (optional), `customer`, and `total`.

The user of your API (an external developer) will create an invoice in your API with a POST request.

    ValueGraphBuilder<N1, V1> castBuilder = cast();
    return new ImmutableValueGraph.Builder<>(castBuilder);
  }

  /**
   * Specifies whether the graph will allow self-loops (edges that connect a node to itself).
   * Attempting to add a self-loop to a graph that does not allow them will throw an {@link
   * UnsupportedOperationException}.
   *
   * <p>The default value is {@code false}.
   */
  @CanIgnoreReturnValue

/// tip | Tipp

Das alles mag gekünstelt wirken. Und es ist möglicherweise noch nicht ganz klar, welchen Nutzen das hat.

Diese Beispiele sind bewusst einfach gehalten, zeigen aber, wie alles funktioniert.

In den Kapiteln zum Thema Sicherheit gibt es Hilfsfunktionen, die auf die gleiche Weise implementiert werden.

  * Allow configuration of a single security group for ELBs ([#45500](https://github.com/kubernetes/kubernetes/pull/45500), [@nbutton23](https://github.com/nbutton23))

  * Remove check that forces loadBalancerSourceRanges to be 0.0.0.0/0. ([#38636](https://github.com/kubernetes/kubernetes/pull/38636), [@dhawal55](https://github.com/dhawal55))

  /** The HTTP {@code Access-Control-Allow-Headers} header field name. */
  public static final String ACCESS_CONTROL_ALLOW_HEADERS = "Access-Control-Allow-Headers";

  /** The HTTP {@code Access-Control-Allow-Methods} header field name. */
  public static final String ACCESS_CONTROL_ALLOW_METHODS = "Access-Control-Allow-Methods";

  /** The HTTP {@code Access-Control-Allow-Origin} header field name. */

 * the client is Microsoft Internet Explorer.
 */

/**
 * A servlet that provides network browsing capabilities for SMB shares using SMB1 protocol.
 * This servlet allows users to browse SMB network resources through a web interface.
 */
public class NetworkExplorer extends HttpServlet {

    /**
     * Default constructor.
     */
    public NetworkExplorer() {
        super();

 *       to <a href="https://github.com/google/guava/issues/3311">more verbose</a>.
 * </ul>
 *
 * <h2>EventBus Summary</h2>
 *
 * <p>The EventBus allows publish-subscribe-style communication between components without requiring
 * the components to explicitly register with one another (and thus be aware of each other). It is