```sh
aws s3api put-object --bucket testbucket --key lockme --object-lock-mode GOVERNANCE --object-lock-retain-until-date "2019-11-20"  --body /etc/issue
```

See <https://docs.aws.amazon.com/AmazonS3/latest/dev/object-lock-overview.html> for AWS S3 spec on object locking and permissions required for object retention and governance bypass overrides.

### Set legal hold on an object

    private static final Logger log = LoggerFactory.getLogger(DisniRdmaConnection.class);

    // DiSNI objects - would be actual DiSNI types in real implementation
    private final Object endpoint; // RdmaActiveEndpoint
    private final Object group; // RdmaActiveEndpointGroup<DisniRdmaEndpoint>

    /**
     * Create new DiSNI RDMA connection
     *
     * @param remote remote socket address

         * @return String
         */
        public String getBbb(final Object a) {
            return null;
        }

        /**
         * @return boolean
         */
        public boolean isCCC() {
            return true;
        }

        /**
         * @return Object
         */
        public Object isDdd() {
            return null;
        }

        /**

import java.util.logging.LogRecord
import java.util.logging.Logger
import java.util.logging.SimpleFormatter
import kotlin.reflect.KClass
import okhttp3.internal.concurrent.TaskRunner
import okhttp3.internal.http2.Http2

object OkHttpDebugLogging {
  // Keep references to loggers to prevent their configuration from being GC'd.
  private val configuredLoggers = CopyOnWriteArraySet<Logger>()

  fun enableHttp2() = enable(Http2::class)

@GwtCompatible
public enum IteratorFeature {
  /** Support for {@link Iterator#remove()}. */
  SUPPORTS_REMOVE,
  /**
   * Support for {@link ListIterator#add(Object)}; ignored for plain {@link Iterator}
   * implementations.
   */
  SUPPORTS_ADD,
  /**
   * Support for {@link ListIterator#set(Object)}; ignored for plain {@link Iterator}
   * implementations.
   */
  SUPPORTS_SET;

  /**

     */
    public NumberConverter(final String pattern) {
        assertArgumentNotEmpty("pattern", pattern);
        this.pattern = pattern;
    }

    @Override
    public Object getAsObject(final String value) {
        if (StringUtil.isEmpty(value)) {
            return null;
        }
        try {
            return new DecimalFormat(pattern).parse(value);

        this.pattern = pattern;
    }

    @Override
    public Object getAsObject(final String value) {
        if (isEmpty(value)) {
            return null;
        }
        return TimestampConversionUtil.toSqlTimestamp(value, pattern);
    }

    @Override
    public String getAsString(final Object value) {
        if (value == null) {
            return null;
        }

    Ticker testTicker = Ticker.systemTicker();
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder().ticker(testTicker);
    assertThrows(IllegalStateException.class, () -> builder.ticker(testTicker));
  }

  public void testRemovalListener_setTwice() {
    RemovalListener<Object, Object> testListener = nullRemovalListener();
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder().removalListener(testListener);

    Ticker testTicker = Ticker.systemTicker();
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder().ticker(testTicker);
    assertThrows(IllegalStateException.class, () -> builder.ticker(testTicker));
  }

  public void testRemovalListener_setTwice() {
    RemovalListener<Object, Object> testListener = nullRemovalListener();
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder().removalListener(testListener);

    AtomicReference<Object> valueRef = new AtomicReference<>();
    Cache<Object, Object> cache =
        new AbstractCache<Object, Object>() {
          @Override
          public @Nullable Object getIfPresent(Object key) {
            return valueRef.get();
          }
        };

    assertNull(cache.getIfPresent(new Object()));

    Object newValue = new Object();
    valueRef.set(newValue);