assertEquals(0, qrList.indexOf(doc1));
        assertEquals(1, qrList.indexOf(doc2));
        assertEquals(2, qrList.lastIndexOf(doc1));

        Map<String, Object> doc3 = new HashMap<>();
        doc3.put("title", "Doc3");
        assertEquals(-1, qrList.indexOf(doc3));
    }

    public void test_listOperations_iterators() {

            parent.add(index, element);
        }

        public E remove(final int index) {
            return parent.remove(index);
        }

        public int indexOf(final Object o) {
            return parent.indexOf(o);
        }

        public int lastIndexOf(final Object o) {
            return parent.lastIndexOf(o);
        }

        public ListIterator<E> listIterator() {

        String hash;
        if (StringUtil.isNotBlank(form.hash)) {
            final String value = URLUtil.decode(form.hash, Constants.UTF_8);
            if (targetUrl.indexOf('#') == -1) {
                final StringBuilder buf = new StringBuilder(value.length() + 100);
                for (final char c : value.toCharArray()) {
                    if (CharUtil.isUrlChar(c) || c == ' ') {

    val now = taskRunner.backend.nanoTime()
    val executeNanoTime = now + delayNanos

    // If the task is already scheduled, take the earlier of the two times.
    val existingIndex = futureTasks.indexOf(task)
    if (existingIndex != -1) {
      if (task.nextExecuteNanoTime <= executeNanoTime) {
        taskRunner.logger.taskLog(task, this) { "already scheduled" }
        return false
      }

        }
        is MappedRange.External -> {
          // Write the mapping.
          val mappingOffset: Int
          val mappedTo = range.mappedTo.utf8()
          val mappingIndex = mappingsBuffer.indexOf(mappedTo)
          if (mappingIndex == -1) {
            mappingOffset = mappingsBuffer.length
            mappingsBuffer.append(mappedTo)
          } else {
            mappingOffset = mappingIndex
          }

            parent.add(index, element);
        }

        public E remove(final int index) {
            return parent.remove(index);
        }

        public int indexOf(final Object o) {
            return parent.indexOf(o);
        }

        public int lastIndexOf(final Object o) {
            return parent.lastIndexOf(o);
        }

        public ListIterator<E> listIterator() {

        return qualifier;
    }

    @Override
    public final void parseVersion(String version) {
        comparable = new ComparableVersion(version);

        int index = version.indexOf('-');

        String part1;
        String part2 = null;

        if (index < 0) {
            part1 = version;
        } else {
            part1 = version.substring(0, index);

                    if (server.length() == 0) {
                        // this can also be a v6 address within brackets, look ahead required
                        final int nexts = str.indexOf('[', si + 1);
                        final int nexte = str.indexOf(']', si);
                        if (nexts >= 0 && nexte >= 0 && nexte == nexts - 1) {
                            server = str.substring(si, nexte + 1);
                            si = nexts;

        ((TestDataService) dataService).setAccessResultList(new TestOpenSearchResultList());

        // Start indexer in separate thread
        indexUpdater.start();

        // Let it run briefly
        ThreadUtil.sleep(100);

        // Stop the indexer
        indexUpdater.setFinishCrawling(true);

        // Wait for completion with longer timeout
        indexUpdater.join(3000);

        if (content == null) {
            return StringUtil.EMPTY;
        }
        String value = content;
        int pos = value.indexOf("<!--");
        while (pos >= 0) {
            final int lastPos = value.indexOf("-->", pos);
            if (lastPos < 0) {
                break;
            }
            if (pos == 0) {
                value = " " + value.substring(lastPos + 3);