import org.jspecify.annotations.Nullable;

/**
 * Provides static methods acting on or generating a {@code Multimap}.
 *
 * <p>See the Guava User Guide article on <a href=
 * "https://github.com/google/guava/wiki/CollectionUtilitiesExplained#multimaps">{@code
 * Multimaps}</a>.
 *
 * @author Jared Levy
 * @author Robert Konigsberg
 * @author Mike Bostock
 * @author Louis Wasserman
 * @since 2.0
 */
@GwtCompatible

[Moving container registry from k8s.gcr.io to registry.k8s.io](https://github.com/kubernetes/kubernetes/pull/109938) got merged. For more details, see the [wiki page](https://github.com/kubernetes/k8s.io/wiki/New-Registry-url-for-Kubernetes-\(registry.k8s.io\)), [announcement](https://groups.google.com/a/kubernetes.io/g/dev/c/DYZYNQ_A6_c/m/oD9_Q8Q9AAAJ) was sent to the kubernetes development mailing list.

- Introduce support for CEL optionals (see [CEL spec proposal 246](https://github.com/google/cel-spec/wiki/proposal-246)).
  This feature will not be fully enabled until a future Kubernetes release (likely to be v1.29), but is added in v1.28 to enable

* 🔒 Check Content-Type request header before assuming JSON. Initial PR [#2118](https://github.com/tiangolo/fastapi/pull/2118) by [@patrickkwang](https://github.com/patrickkwang).

This change fixes a [CSRF](https://en.wikipedia.org/wiki/Cross-site_request_forgery) security vulnerability when using cookies for authentication in path operations with JSON payloads sent by browsers.