public ImmutableMultiset<K> keys() {
    return (ImmutableMultiset<K>) super.keys();
  }

  @Override
  ImmutableMultiset<K> createKeys() {
    return new Keys();
  }

  @SuppressWarnings("serial") // Uses writeReplace, not default serialization
  @WeakOuter
  private final class Keys extends ImmutableMultiset<K> {
    @Override
    public boolean contains(@Nullable Object object) {
      return containsKey(object);

 * support either all add operations or none of them, all removal operations or none of them, and if
 * and only if all of these are supported, the {@code setCount} methods as well.
 *
 * <p>A multiset uses {@link Object#equals} to determine whether two instances should be considered
 * "the same," <i>unless specified otherwise</i> by the implementation.
 *

   * {@code Ordering.natural()} if the left map uses the natural ordering of its elements. This
   * difference is an immutable snapshot of the state of the maps at the time this method is called.
   * It will never change, even if the maps change at a later time.
   *
   * <p>Since this method uses {@code TreeMap} instances internally, the keys of the right map must

   * {@code Ordering.natural()} if the left map uses the natural ordering of its elements. This
   * difference is an immutable snapshot of the state of the maps at the time this method is called.
   * It will never change, even if the maps change at a later time.
   *
   * <p>Since this method uses {@code TreeMap} instances internally, the keys of the right map must

    }.also { expected ->
      when (expected) {
        is SocketTimeoutException, is SSLException -> {}
        else -> throw expected
      }
    }

    // The second call times out because it uses the same bad connection.
    val call2 = client.newCall(Request(server.url("/")))
    assertFailsWith<SocketTimeoutException> {
      call2.execute()
    }

- The deprecated taints `node.alpha.kubernetes.io/notReady` and `node.alpha.kubernetes.io/unreachable` are no longer supported or adjusted. These uses should be replaced with `node.kubernetes.io/not-ready` and `node.kubernetes.io/unreachable`
 ([#73001](https://github.com/kubernetes/kubernetes/pull/73001), [@shivnagarajan](https://github.com/shivnagarajan))

@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

<details markdown="1">
<summary>Or use <code>async def</code>...</summary>

If your code uses `async` / `await`, use `async def`:

```Python hl_lines="9  14"
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
async def read_root():

 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.smb;

import java.io.IOException;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentHashMap;

          && hashCodeInsensitiveToArgReference(
              factory, args, i, generateDummyArg(param, newFreshValueGenerator()))) {
        // If the implementation uses identityHashCode(), referential equality is
        // probably intended. So no point in using an equal-but-different factory argument.
        // We check twice to avoid confusion caused by accidental hash collision.

   * an entry for the provided key, and if so replaces the delegate.
   */

  private transient Map<K, Collection<V>> map;
  private transient int totalSize;

  /**
   * Creates a new multimap that uses the provided map.
   *
   * @param map place to store the mapping from each key to its corresponding values
   * @throws IllegalArgumentException if {@code map} is not empty
   */