}

func saveKeyEtcd(ctx context.Context, client *etcd.Client, key string, data []byte, opts ...options) error {
	timeoutCtx, cancel := context.WithTimeout(ctx, defaultContextTimeout)
	defer cancel()
	if len(opts) > 0 {
		return saveKeyEtcdWithTTL(ctx, client, key, data, opts[0].ttl)
	}
	_, err := client.Put(timeoutCtx, key, string(data))
	etcdLogIf(ctx, err)
	return etcdErrToErr(err, client.Endpoints())
}

    }

    static <K, V> Map<K, V> singletonMap(K key, V value) {
        return new Map1<>(key, value);
    }

    private static class Map1<K, V> extends AbstractImmutableMap<K, V> {
        private final Entry<K, V> entry;

        private Map1(K key, V value) {
            this.entry = new SimpleImmutableEntry<>(key, value);
        }

        @Override

		var key []byte
		if crypto.SSECopy.IsRequested(h) {
			sseCopyKey, err := crypto.SSECopy.ParseHTTP(h)
			if err != nil {
				return nil, err
			}
			key = sseCopyKey[:]
		} else {
			if k, err := crypto.SSEC.ParseHTTP(h); err == nil {
				key = k[:]
			}
		}
		key, err := decryptObjectMeta(key, o.Bucket, o.Name, o.UserDefined)
		if err != nil {
			return nil, err
		}

  }

  /** Given a key, returns the index of the entry in the tables, or ABSENT if not found. */
  private int findEntryByKey(@Nullable Object key) {
    return findEntryByKey(key, Hashing.smearedHash(key));
  }

  /**
   * Given a key and its hash, returns the index of the entry in the tables, or ABSENT if not found.
   */
  private int findEntryByKey(@Nullable Object key, int keyHash) {

func (c *LRU[K, V]) Contains(key K) (ok bool) {
	c.mu.Lock()
	defer c.mu.Unlock()
	_, ok = c.items[key]
	return ok
}

// Peek returns the key value (or undefined if not found) without updating
// the "recently used"-ness of the key.
func (c *LRU[K, V]) Peek(key K) (value V, ok bool) {
	c.mu.Lock()
	defer c.mu.Unlock()
	var ent *Entry[K, V]
	if ent, ok = c.items[key]; ok {
		// Expired item check

	ErrInvalidCustomerKey = Errorf("The SSE-C client key is invalid")

	// ErrSecretKeyMismatch indicates that the provided secret key (SSE-C client key / SSE-S3 KMS key)
	// does not match the secret key used during encrypting the object.
	ErrSecretKeyMismatch = Errorf("The secret key does not match the secret key used during upload")

	// ErrCustomerKeyMD5Mismatch indicates that the SSE-C key MD5 does not match the

            return exception;
        }
    }

    Key createKey(
            MavenProject project,
            Collection<String> scopesToCollect,
            Collection<String> scopesToResolve,
            boolean aggregating,
            RepositorySystemSession session);

    CacheRecord get(Key key) throws LifecycleExecutionException;

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

            RepositorySystemSession session);

    CacheRecord get(Key key);

    default CacheRecord get(Key key, PluginRealmSupplier supplier)
            throws PluginResolutionException, PluginContainerException {
        CacheRecord cr = get(key);
        if (cr == null) {
            CacheRecord tcr = supplier.load();
            cr = put(key, tcr.getRealm(), tcr.getArtifacts());
        }
        return cr;
    }

        }
    }

    protected final Map<Key, CacheRecord> cache = new ConcurrentHashMap<>();

    @Override
    public Key createKey(List<? extends ClassRealm> extensionRealms) {
        return new CacheKey(extensionRealms);
    }

    @Override
    public CacheRecord get(Key key) {
        return cache.get(key);
    }

    @Override

	MultipleTargets bool `json:"multipleTargets"`
}

// HelpKVS - implement order of keys help messages.
type HelpKVS []HelpKV

// Lookup - lookup a key from help kvs.
func (hkvs HelpKVS) Lookup(key string) (HelpKV, bool) {
	for _, hkv := range hkvs {
		if hkv.Key == key {
			return hkv, true
		}
	}
	return HelpKV{}, false
}

// DefaultComment used across all sub-systems.