import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * An immutable object that may contain a non-null reference to another object. Each instance of
 * this type either contains a non-null reference, or contains nothing (in which case we say that
 * the reference is "absent"); it is never said to "contain {@code null}".
 *
 * <p>A non-null {@code Optional<T>} reference can be used as a replacement for a nullable {@code T}

        case STARTING:
        case STOPPING:
          snapshot = new StateSnapshot(FAILED, false, cause);
          enqueueFailedEvent(previous, cause);
          break;
        case FAILED:
          // Do nothing
          break;
      }
    } finally {
      monitor.leave();
      dispatchListenerEvents();
    }
  }

  @Override
  public final boolean isRunning() {
    return state() == RUNNING;

		t.Errorf("invalid data after update, got %+v", product)
	}

	var result Product3
	DB.First(&result, product.ID)

	AssertEqual(t, result, product)

	// Select to change Code, but nothing updated, price should not change
	DB.Model(&product).Select("code").Updates(Product3{Name: "L1214", Code: "L1213"})

	if product.Price != 220 || product.Code != "L1213" || product.Name != "Product New3" {

    /**
     * Private constructor to prevent instantiation of this utility class.
     * This class is intended to be used only through its static methods.
     */
    protected FessFunctions() {
        // nothing
    }

    /**
     * Generates an HTML opening or closing tag with appropriate language attribute.
     *
     * @param isOpen true to generate opening HTML tag, false for closing tag

type metacacheReader struct {
	mr      *msgp.Reader
	current metaCacheEntry
	err     error // stateful error
	closer  func()
	creator func() error
}

// newMetacacheReader creates a new cache reader.
// Nothing will be read from the stream yet.
func newMetacacheReader(r io.Reader) *metacacheReader {
	dec := s2DecPool.Get()
	dec.Reset(r)
	mr := msgpNewReader(dec)
	return &metacacheReader{
		mr: mr,
		closer: func() {

     * with merged information or a clone of {@code recessive} if
     * {@code dominant} is {@code null}.
     *
     * @param dominant the node
     * @param recessive if {@code null}, nothing will happen
     * @return the merged node
     *
     * @deprecated use {@link XmlService#merge(XmlNode, XmlNode, Boolean)} instead
     */
    @Deprecated(since = "4.0.0", forRemoval = true)
    @Nullable

			case freeVersionTask:
				oi := v.ObjectInfo
				traceFn := globalLifecycleSys.trace(oi)
				if !oi.TransitionedObject.FreeVersion {
					// nothing to be done
					continue
				}

				ignoreNotFoundErr := func(err error) error {
					switch {
					case isErrVersionNotFound(err), isErrObjectNotFound(err):
						return nil
					}
					return err

    }
    
    @Override
    public int getMaxMessageSize() {
        return 65536;  // 64KB for TCP
    }
    
    @Override
    public void shutdown() {
        // Nothing to clean up for TCP
    }
}
```

## 5. Integration with Existing Code

### 5.1 Transport Selection
```java
// In SmbTransportPool.java
public SmbTransport createTransport(CIFSContext context, 

        byte[] wireFileId = new byte[16];
        System.arraycopy(buffer, 8, wireFileId, 0, 16);
        assertArrayEquals(testFileId, wireFileId);

        // Verify nothing was written beyond the structure
        assertEquals((byte) 0xCC, buffer[24]);
    }

    @Test
    @DisplayName("Test request implements RequestWithFileId interface correctly")

                readBytes.update(acknowledged = unacknowledgedBytesRead)
              }
            } else if (!finished && errorExceptionToDeliver == null) {
              // Nothing to do. Wait until that changes then try again.
              waitForIo()
              tryAgain = true
            }
          } finally {
            if (doReadTimeout) {