public boolean containsKey(@Nullable Object key) {
      return unfiltered.containsKey(key) && apply(key, unfiltered.get(key));
    }

    @Override
    public @Nullable V get(@Nullable Object key) {
      V value = unfiltered.get(key);
      return ((value != null) && apply(key, value)) ? value : null;
    }

    @Override
    public boolean isEmpty() {
      return entrySet().isEmpty();
    }

  protected Entry<K, V> entry(K key, V value) {
    return mapEntry(key, value);
  }

  @Override
  protected void expectContents(Collection<Entry<K, V>> expected) {
    // TODO: move this to invariant checks once the appropriate hook exists?
    super.expectContents(expected);
    for (Entry<K, V> entry : expected) {
      assertEquals(

    resetContainer();
  }

  protected void assertGet(K key, V... values) {
    assertGet(key, asList(values));
  }

  protected void assertGet(K key, Collection<? extends V> values) {
    assertEqualIgnoringOrder(values, multimap().get(key));

    if (!values.isEmpty()) {
      assertEqualIgnoringOrder(values, multimap().asMap().get(key));
      assertFalse(multimap().isEmpty());
    } else {

        }
    }

    Key createKey(
            Plugin plugin,
            DependencyFilter extensionFilter,
            List<RemoteRepository> repositories,
            RepositorySystemSession session);

    CacheRecord get(Key key) throws PluginResolutionException;

    CacheRecord put(Key key, List<Artifact> pluginArtifacts);

    CacheRecord put(Key key, PluginResolutionException e);

    void flush();

  public boolean containsKey(@Nullable Object key) {
    return indexOf(key) != -1;
  }

  public int get(@Nullable Object key) {
    int index = indexOf(key);
    return (index == -1) ? 0 : values[index];
  }

  @CanIgnoreReturnValue
  public int remove(@Nullable Object key) {
    return remove(key, smearedHash(key));
  }

  private int remove(@Nullable Object key, int hash) {

    ## Example

    ```python
    from fastapi import Depends, FastAPI
    from fastapi.security import APIKeyHeader

    app = FastAPI()

    header_scheme = APIKeyHeader(name="x-key")


    @app.get("/items/")
    async def read_items(key: str = Depends(header_scheme)):
        return {"key": key}
    ```
    """

    def __init__(

                        keys ->
                            path.create(transform(keys, key -> immutableEntry(key, new Object()))),
                        keys ->
                            path.create(transform(keys, key -> immutableEntry(new Object(), key))),
                        keys -> path.create(transform(keys, key -> immutableEntry(key, key)))))
            .collect(toImmutableList()),
        n -> n * log(n),
        ImmutableList.of(

          && Objects.equals(key, key(entryIndex))) {
        return entryIndex;
      }
      next = CompactHashing.getNext(entry, mask);
    } while (next != UNSET);
    return -1;
  }

  @Override
  public boolean containsKey(@Nullable Object key) {
    Map<K, V> delegate = delegateOrNull();
    return (delegate != null) ? delegate.containsKey(key) : indexOf(key) != -1;
  }

  @Override

    return generateListMultimap(key, value);
  }

  @Generates
  static <K, V> ImmutableMultimap<K, V> generateImmutableMultimap(K key, V value) {
    return ImmutableMultimap.of(key, value);
  }

  @Generates
  static <K, V> ListMultimap<K, V> generateListMultimap(@Nullable K key, @Nullable V value) {
    return generateArrayListMultimap(key, value);
  }

  @Generates

from fastapi import Depends, FastAPI, Security
from fastapi.security import APIKeyHeader
from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()

api_key = APIKeyHeader(name="key", description="An API Key Header")


class User(BaseModel):
    username: str


def get_current_user(oauth_header: str = Security(api_key)):
    user = User(username=oauth_header)
    return user