* Gets the installation settings source.
     *
     * @return the installation settings source or {@code null} if none
     */
    @Nonnull
    Optional<Source> getInstallationSettingsSource();

    /**
     * Gets the project settings source.
     *
     * @return the project settings source or {@code null} if none
     */
    @Nonnull
    Optional<Source> getProjectSettingsSource();

    /**

## Retrying Requests

Sometimes connections fail: either a pooled connection was stale and disconnected, or the webserver itself couldn’t be reached. OkHttp will retry the request with a different route if one is available.

       *   setFuture called on it: Neither of those can happen until we've finished processing all
       *   the completed inputs. And we're still processing at least one input, the one that
       *   triggered handleException.)
       *
       * TODO(cpovirk): Think about whether we could/should use Verify to check the return value of
       * addCausalChain.
       */

func (es *expiryState) enqueueTierJournalEntry(je jentry) {
	wrkr := es.getWorkerCh(je.OpHash())
	if wrkr == nil {
		es.stats.missedTierJournalTasks.Add(1)
		return
	}
	select {
	case <-GlobalContext.Done():
	case wrkr <- je:
	default:
		es.stats.missedTierJournalTasks.Add(1)
	}
}

// enqueueFreeVersion enqueues a free version to be deleted
func (es *expiryState) enqueueFreeVersion(oi ObjectInfo) {

 *
 * All event methods must execute fast, without external locking, cannot throw exceptions, attempt
 * to mutate the event parameters, or be re-entrant back into the client. Any IO - writing to files
 * or network should be done asynchronously.
 */
abstract class EventListener {
  /**
   * Invoked as soon as a call is enqueued or executed by a client. In case of thread or stream

		}

		if retErr != nil {
			healingLogIf(ctx, fmt.Errorf("listing failed with: %v on bucket: %v", retErr, bucket))
			continue
		}

		select {
		// If context is canceled don't mark as done...
		case <-ctx.Done():
			return ctx.Err()
		default:
			tracker.bucketDone(bucket)
			healingLogIf(ctx, tracker.update(ctx))
		}
	}
	if retErr != nil {
		return retErr
	}

	// Last sanity check

   */
  public long get(K key) {
    return map.getOrDefault(key, 0L);
  }

  /**
   * Increments by one the value currently associated with {@code key}, and returns the new value.
   */
  @CanIgnoreReturnValue
  public long incrementAndGet(K key) {
    return addAndGet(key, 1);
  }

  /**
   * Decrements by one the value currently associated with {@code key}, and returns the new value.
   */
  @CanIgnoreReturnValue

     * MEECAQAwEwYHKoZIzj0CAQYIKoZIzj0DAQcEJzAlAgEBBCA7ODT0xhGSNn4ESj6J
     * lu/GJQZoU9lDrCPeUcQ28tzOWw==
     * -----END PRIVATE KEY-----
     * ```
     *
     * The string should contain exactly one certificate and one private key in [PKCS #8][rfc_5208]
     * format. It should not contain any other PEM-encoded blocks, but it may contain other text
     * which will be ignored.
     *

     * If specified, a dependency resolution request will be issued,
     * else a dependency collection request will be done.
     *
     * @return the id of the path scope
     */
    String pathScope() default "";

    /**
     * The request type, in case the default one is not correct.
     * Valid values are {@code collect}, {@code flatten}, or {@code resolve}.
     *
     * @return the request type
     */

        crawlerContext.setStatus(CrawlerStatus.RUNNING);
        assertEquals(CrawlerStatus.RUNNING, crawlerContext.getStatus());

        crawlerContext.setStatus(CrawlerStatus.DONE);
        assertEquals(CrawlerStatus.DONE, crawlerContext.getStatus());

        crawlerContext.setStatus(null);
        assertNull(crawlerContext.getStatus());
    }

    /**
     * Test urlFilter getter and setter
     */