if (th != null) {
            this.treeHandle = null;

            // Optimization: For non-strict lifecycle, delay tree handle closure
            // to allow connection reuse for subsequent operations
            if (this.transportContext.getConfig().isStrictResourceLifecycle()) {
                th.close();
            } else {

      return Maps.keyIterator(entrySet().iterator());
    }
  }

  @LazyInit private transient @Nullable Set<V> valueSet;

  @Override
  public Set<V> values() {
    /*
     * We can almost reuse the inverse's keySet, except we have to fix the
     * iteration order so that it is consistent with the forward map.
     */
    Set<V> result = valueSet;
    return (result == null) ? valueSet = new ValueSet() : result;

	if err != nil {
		return nil, err
	}
	cl.subroute = &c.subID
	return cl, nil
}

// Request allows to do a single remote request.
// 'req' will not be used after the call and caller can reuse.
// If no deadline is set on ctx, a 1-minute deadline will be added.
func (c *Connection) Request(ctx context.Context, h HandlerID, req []byte) ([]byte, error) {
	if !h.valid() {
		return nil, ErrUnknownHandler
	}

     *       ThreadConfinedTaskQueue object must be created for each inline execution, because
     *       observing a null thread does not mean the object is safe to reuse.
     *   <li>If this field's value is some other thread object, we know that it's not our thread.
     *   <li>If this field's value == null because it originally belonged to another thread and that

### Creating the `Settings` only once with `lru_cache` { #creating-the-settings-only-once-with-lru-cache }

Reading a file from disk is normally a costly (slow) operation, so you probably want to do it only once and then reuse the same settings object, instead of reading it for each request.

But every time we do:

```Python
Settings()
```

			return convertAccessError(err, errVolumeAccessDenied)
		}
	}

	// Use a small block size to start sending quickly
	w := newMetacacheWriter(wr, 16<<10)
	w.reuseBlocks = true // We are not sharing results, so reuse buffers.
	defer w.Close()
	out, err := w.stream()
	if err != nil {
		return err
	}
	defer xioutil.SafeClose(out)
	var objsReturned int

	objReturned := func(metadata []byte) {
		if opts.Limit <= 0 {

  private var closed: Boolean = false

  /**
   * The number of HTTP requests received thus far by this server. This may exceed the number of
   * HTTP connections when connection reuse is in practice.
   */
  public val requestCount: Int
    get() = atomicRequestCount.get()

  /** The number of bytes of the POST body to keep in memory to the given limit. */

import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

public class DirectoryLeaseManager {
    private final CIFSContext context;
    private final LeaseManager baseLeaseManager;  // Reuse existing lease manager
    private final ConcurrentHashMap<String, DirectoryCacheEntry> directoryCache;
    private final ConcurrentHashMap<Smb2LeaseKey, String> leaseToPath;
    private final ScheduledExecutorService scheduler;

    assertNotNull(region);
    assertTrue(region.getSize() >= 1024);
    
    // Test buffer release
    manager.releaseSendRegion(region);
    
    // Test reuse
    RdmaMemoryRegion region2 = manager.getSendRegion(1024);
    assertNotNull(region2);
    
    manager.cleanup();
}
```

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

The `security_scopes` object (of class `SecurityScopes`) also provides a `scope_str` attribute with a single string, containing those scopes separated by spaces (we are going to use it).

We create an `HTTPException` that we can reuse (`raise`) later at several points.