the preceding example we used a field, `callStartNanos`, to track the elapsed time of each event. This is handy, but it won’t work if multiple calls are executing concurrently. To accommodate this, use a `Factory` to create a new `EventListener` instance for each `Call`. This allows each listener to keep call-specific state.

This [sample factory](https://github.com/square/okhttp/blob/master/samples/guide/src/main/java/okhttp3/recipes/PrintEvents.java) creates a unique ID for each call...

      }
    }
  }

  private fun readAndWriteFrames() {
    check(socket == null)
    val socket = serverSocket!!.accept()!!
    this.socket = socket

    // Bail out now if this instance was closed while waiting for the socket to accept.
    synchronized(this) {
      if (executor.isShutdown) {
        socket.close()
        return
      }
    }
    val outputStream = socket.getOutputStream()

		t.Fatalf("CreateInBatches failed: %v", err)
	}

	results, err := gorm.G[User](DB).Where("name like ?", "GenericsDistinct%").Distinct("name").Find(ctx)
	if err != nil {
		t.Fatalf("Distinct Find failed: %v", err)
	}

	if len(results) != 2 {
		t.Errorf("expected 2 distinct names, got %d", len(results))
	}

	var names []string
	for _, u := range results {
		names = append(names, u.Name)
	}

 * Provides functionality to store, retrieve, and manage failed crawling attempts
 * with their associated error information.
 */
public class FailureUrlService {

    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(FailureUrlService.class);

    /**
     * Default constructor.
     */
    public FailureUrlService() {
        // Default constructor

   * delegates each of its operations to the appropriate methods of this {@code
   * ForwardingSortedMultiset}.
   *
   * <p>In many cases, you may wish to override {@link #descendingMultiset()} to return an instance
   * of a subclass of {@code StandardDescendingMultiset}.
   *
   * @since 15.0
   */
  protected abstract class StandardDescendingMultiset extends DescendingMultiset<E> {
    /** Constructor for use by subclasses. */

 * resulting XML document is parsed, the parser API will return this text as the original literal
 * string {@code "Foo<Bar>"}.
 *
 * <p>A {@code CharEscaper} instance is required to be stateless, and safe when used concurrently by
 * multiple threads.
 *
 * <p>Popular escapers are defined as constants in classes like {@link

    }

    /**
     * Returns a filter for directories that may contain paths accepted by the given matcher.
     * The given path matcher should be an instance created by this service.
     * The path matcher returned by this method expects directory paths.
     * If that matcher returns {@code false}, then the directory will definitively not contain

That when called, return instances of classes of the same name.

So, you import `Query`, which is a function. And when you call it, it returns an instance of a class also named `Query`.

These functions are there (instead of just using the classes directly) so that your editor doesn't mark errors about their types.

 *
 */
/**
 * This class is an implementation of {@link UrlQueueService}.
 */
public class UrlQueueServiceImpl implements UrlQueueService<UrlQueueImpl<Long>> {

    /**
     * Creates a new UrlQueueServiceImpl instance.
     */
    public UrlQueueServiceImpl() {
        // NOP
    }

    private static final Logger logger = LogManager.getLogger(UrlQueueServiceImpl.class);

    /**
     * The memory data helper.
     */

            return updateEntity(source, result);
        } catch (InstantiationException | IllegalAccessException e) {
            final String msg = "Cannot create a new instance: " + entityType.getName();
            throw new IllegalBehaviorStateException(msg, e);
        }
    }

    protected <RESULT extends FileAuthentication> RESULT updateEntity(Map<String, Object> source, RESULT result) {