SampleElements<Entry<K, V>> mapEntries(SampleElements<K> keys, SampleElements<V> values) {
    return new SampleElements<>(
        Helpers.mapEntry(keys.e0(), values.e0()),
        Helpers.mapEntry(keys.e1(), values.e1()),
        Helpers.mapEntry(keys.e2(), values.e2()),
        Helpers.mapEntry(keys.e3(), values.e3()),
        Helpers.mapEntry(keys.e4(), values.e4()));
  }

  public E e0() {
    return e0;
  }

      SampleElements<Entry<K, V>> mapEntries(SampleElements<K> keys, SampleElements<V> values) {
    return new SampleElements<>(
        Helpers.mapEntry(keys.e0(), values.e0()),
        Helpers.mapEntry(keys.e1(), values.e1()),
        Helpers.mapEntry(keys.e2(), values.e2()),
        Helpers.mapEntry(keys.e3(), values.e3()),
        Helpers.mapEntry(keys.e4(), values.e4()));
  }

  public E e0() {
    return e0;
  }

    private final ImmutableList<String> keys;
    private final Random random = new Random();

    private MutateTask(ConcurrentHashMultiset<String> multiset, ImmutableList<String> keys) {
      this.multiset = multiset;
      this.keys = keys;
    }

    @Override
    public int[] call() throws Exception {
      int iterations = 100000;
      int nKeys = keys.size();
      int[] deltas = new int[nKeys];

## MinIO Docker Tips

### MinIO Custom Access and Secret Keys

To override MinIO's auto-generated keys, you may pass secret and access keys explicitly as environment variables. MinIO server also allows regular strings as access and secret keys.

#### GNU/Linux and macOS (custom access and secret keys)

```sh
docker run \
  -p 9000:9000 \
  -p 9001:9001 \
  --name minio1 \

	EnvKESAPIKey           = "MINIO_KMS_KES_API_KEY"        // Access credential for KES - API keys and private key / certificate are mutually exclusive
	EnvKESClientKey        = "MINIO_KMS_KES_KEY_FILE"       // Path to TLS private key for authenticating to KES with mTLS - usually prefer API keys
	EnvKESClientPassword   = "MINIO_KMS_KES_KEY_PASSWORD"   // Optional password to decrypt an encrypt TLS private key

    }
    expectUnchanged();
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})
  public void testPut_nullKeySupportedNotPresent() {
    assertNull("put(null, value) should return null", put(nullKeyEntry));
    expectAdded(nullKeyEntry);
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})
  @CollectionSize.Require(absent = ZERO)
  public void testPut_nullKeySupportedPresent() {

public class MapCreationTester<K, V> extends AbstractMapTester<K, V> {
  @MapFeature.Require(ALLOWS_NULL_KEYS)
  @CollectionSize.Require(absent = ZERO)
  public void testCreateWithNullKeySupported() {
    initMapWithNullKey();
    expectContents(createArrayWithNullKey());
  }

  @MapFeature.Require(absent = ALLOWS_NULL_KEYS)
  @CollectionSize.Require(absent = ZERO)
  public void testCreateWithNullKeyUnsupported() {
    try {

public class MapCreationTester<K, V> extends AbstractMapTester<K, V> {
  @MapFeature.Require(ALLOWS_NULL_KEYS)
  @CollectionSize.Require(absent = ZERO)
  public void testCreateWithNullKeySupported() {
    initMapWithNullKey();
    expectContents(createArrayWithNullKey());
  }

  @MapFeature.Require(absent = ALLOWS_NULL_KEYS)
  @CollectionSize.Require(absent = ZERO)
  public void testCreateWithNullKeyUnsupported() {
    try {

  @Override
  SortedMap<K, V> create(Object... elements);

  /**
   * Returns an entry with a key less than the keys of the {@link #samples()} and less than the key
   * of {@link #belowSamplesGreater()}.
   */
  Entry<K, V> belowSamplesLesser();

  /**
   * Returns an entry with a key less than the keys of the {@link #samples()} but greater than the
   * key of {@link #belowSamplesLesser()}.
   */

    map.remove("a");
    assertFalse(underlying.containsKey("a"));

    Set<String> keys = map.keySet();
    keys.remove("b");
    assertFalse(underlying.containsKey("b"));

    Iterator<String> keyIterator = keys.iterator();
    keyIterator.next();
    keyIterator.remove();
    assertFalse(underlying.containsKey("c"));