* but mutates {@code multisetToModify} instead of returning a view.
   *
   * <p>In contrast, {@code multisetToModify.retainAll(multisetToRetain)} keeps all occurrences of
   * elements that appear at all in {@code multisetToRetain}, and deletes all occurrences of all
   * other elements.
   *

   * values.length) are all {@code null}.
   */
  @VisibleForTesting transient @Nullable Object @Nullable [] values;

  /**
   * Keeps track of metadata like the number of hash table bits and modifications of this data
   * structure (to make it possible to throw ConcurrentModificationException in the iterator). Note

        log.info("Connection lost, waiting for witness notification before retry");
        
        // Wait briefly for witness notification before retrying
        try {
            Thread.sleep(2000);  // 2 second grace period
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }
    
    // Proceed with normal error handling/retry

    failover.handleFailure(channel, error);
    
    // Verify channel marked as failed
    assertEquals(ChannelState.FAILED, channel.getState());
    
    // Verify recovery attempted
    Thread.sleep(2000);
    assertTrue(channel.getState() == ChannelState.ESTABLISHED 
        || manager.getChannels().isEmpty());
}
```

### 7.2 Integration Tests
```java
@Test

 *
 * <p><a id="iteration"></a>
 *
 * <p><b>Key-grouped iteration.</b> All view collections follow the same iteration order. In all
 * current implementations, the iteration order always keeps multiple entries with the same key
 * together. Any creation method that would customarily respect insertion order (such as {@link
 * #copyOf(Multimap)}) instead preserves key-grouped order by inserting entries for an existing key

   *       of a task are ignored.
   * </ol>
   *
   * <p>{@code RuntimeException}s thrown by tasks are simply logged and the executor keeps trucking.
   * If an {@code Error} is thrown, the error will propagate and execution will stop until the next
   * time a task is submitted.
   *

    `HandshakeCertificates` holds the TLS certificates required for a TLS handshake. On the server
    it keeps your `HeldCertificate` and its chain. On the client it keeps the root certificates
    that are trusted to sign a server's certificate chain. `HandshakeCertificates` also works with
    mutual TLS where these roles are reversed.

        if (effect.shutdownInput) socket.shutdownInput()
        if (effect.shutdownOutput) socket.shutdownOutput()
        if (effect.closeSocket) socket.close()
      }

      Stall -> {
        // Sleep until the socket is closed.
        socket.sleepWhileOpen(TimeUnit.MINUTES.toNanos(60))
        error("expected timeout")
      }
    }

    return true
  }

  @Throws(IOException::class)

	// As long as the compressed size is not also 2³²-1 (implausible)
	// and the header is not also 2³²-1 (equally implausible),
	// accept the uncompressed size 2³²-1 as valid.
	// If nothing else, this keeps archive/zip working with 42.zip.
	_ = needUSize

	if needCSize || needHeaderOffset {
		return ErrFormat
	}

	return nil
}

func readDataDescriptor(r io.Reader, f *File) error {

      Object oldValue = ref.get();
      if (oldValue == null) {
        expectedComputations++;
      }
      ref = new WeakReference<>(cache.getUnchecked(1));
      oldValue = null;
      Thread.sleep(i);
      System.gc();
    }
    assertThat(countingLoader.getCount()).isEqualTo(expectedComputations);

    for (int i = 0; i < iterations; i++) {