* guarantee serial access, it is critical that <b>all</b> access to the backing multimap is
   * accomplished through the returned multimap.
   *
   * <p>It is imperative that the user manually synchronize on the returned multimap when accessing
   * any of its collection views:
   *
   * {@snippet :
   * Multimap<K, V> multimap = Multimaps.synchronizedMultimap(HashMultimap.create());

            if (interfaceMethod != null) {
                return interfaceMethod;
            }
        }

        return null;
    }

    /**
     * Used for the iterative discovery process for public methods.
     */
    private static final class MethodInfo {
        Method method;

        String name;

        Class<?>[] parameterTypes;

        boolean upcast;

- The `WarningHeader` feature is now GA and is unconditionally enabled. The `apiserver_requested_deprecated_apis` metric has graduated to stable status. The `WarningHeader` feature-gate is no longer operative and will be removed in v1.24. ([#100754](https://github.com/kubernetes/kubernetes/pull/100754), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, Instrumentation and Testing]