*/
    public ChannelInfo selectChannel(CommonServerMessageBlock message) throws NoAvailableChannelException {
        Collection<ChannelInfo> availableChannels = manager.getHealthyChannels();

        if (availableChannels.isEmpty()) {
            throw new NoAvailableChannelException("No healthy channels available");
        }

        if (availableChannels.size() == 1) {
            return availableChannels.iterator().next();
        }

  fun idleLatch(): CountDownLatch {
    taskRunner.withLock {
      // If the queue is already idle, that's easy.
      if (activeTask == null && futureTasks.isEmpty()) {
        return CountDownLatch(0)
      }

      // If there's an existing AwaitIdleTask, use it. This is necessary when the executor is
      // shutdown but still busy as we can't enqueue in that case.

     */
    public void addExtractor(final List<String> keyList, final Extractor extractor) {
        if (keyList == null || keyList.isEmpty()) {
            throw new CrawlerSystemException("The key list is empty.");
        }
        keyList.stream().distinct().forEach(key -> addExtractor(key, extractor));
    }

    /**

    TreeSet<Derived> set = Sets.newTreeSet();
    assertTrue(set.isEmpty());
    set.add(new Derived("foo"));
    set.add(new Derived("bar"));
    assertThat(set).containsExactly(new Derived("bar"), new Derived("foo")).inOrder();
  }

  public void testNewTreeSetEmptyNonGeneric() {
    TreeSet<LegacyComparable> set = Sets.newTreeSet();
    assertTrue(set.isEmpty());
    set.add(new LegacyComparable("foo"));

  }

  public void testLineReading() throws IOException {
    File temp = createTempFile();
    assertNull(Files.readFirstLine(temp, UTF_8));
    assertTrue(Files.readLines(temp, UTF_8).isEmpty());

    PrintWriter w = new PrintWriter(Files.newWriter(temp, UTF_8));
    w.println("hello");
    w.println("");
    w.println(" world  ");
    w.println("");
    w.close();

		} else {
			policy, perr := policy.ParseConfig(bytes.NewReader(item.Policy))
			if perr != nil {
				writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, perr), r.URL)
				return
			}
			if policy.IsEmpty() {
				err = globalSiteReplicationSys.PeerAddPolicyHandler(ctx, item.Name, nil, item.UpdatedAt)
			} else {
				err = globalSiteReplicationSys.PeerAddPolicyHandler(ctx, item.Name, policy, item.UpdatedAt)
			}
		}

        assertEquals(1, qrList.size());
        assertEquals(doc2, qrList.get(0));

        assertTrue(qrList.remove(doc2));
        assertEquals(0, qrList.size());
        assertTrue(qrList.isEmpty());
    }

    public void test_listOperations_contains() {
        List<Map<String, Object>> documentList = new ArrayList<>();
        Map<String, Object> doc1 = new HashMap<>();
        doc1.put("title", "Doc1");

     */
    default Object evaluateValue(final String scriptType, final String template, final Map<String, Object> paramMap) {
        if (StringUtil.isEmpty(template)) {
            return StringUtil.EMPTY;
        }

        return ComponentUtil.getScriptEngineFactory().getScriptEngine(scriptType).evaluate(template, paramMap);
    }

    /**

                return new HighlightInfo();
            }

            @Override
            public boolean hasConditionQuery() {
                return conditions != null && !conditions.isEmpty();
            }

        }).escape(escape).build();
    }

    // Additional test methods for improved coverage

    public void test_conditions_filetype() {
        final String k = "filetype";

          return backingMap.entrySet().iterator();
        }
      };
    }

    @Override
    public void clear() {
      standardClear();
    }

    @Override
    public boolean isEmpty() {
      return standardIsEmpty();
    }

    @Override
    public SortedMap<K, V> subMap(K fromKey, K toKey) {
      return standardSubMap(fromKey, toKey);
    }

    @Override