final String[] values = s.split(":");
            if (values.length == 1) {
                pair.setFirst(values[0].trim());
                pair.setSecond(1.0f);
            } else if (values.length > 1) {
                pair.setFirst(values[0]);
                pair.setSecond(Float.parseFloat(values[1]));
            } else {
                return null;
            }

        this.second = second;
    }

    /**
     * 1番目の値を返します。
     *
     * @return 1番目の値
     */
    public T1 getFirst() {
        return first;
    }

    /**
     * 1番目の値を設定します。
     *
     * @param first
     *            1番目の値
     */
    public void setFirst(final T1 first) {
        this.first = first;
    }

    /**
     * 2番目の値を返します。
     *
     * @return 2番目の値
     */

        assertEquals(1, list.size());
        assertEquals("playwright", list.get(0).getFirst());
        assertEquals("http://.*", list.get(0).getSecond().pattern());

        list = crawlerThread.getClientRuleList("playwright:http://.*,playwright:https://.*");
        assertEquals(2, list.size());
        assertEquals("playwright", list.get(0).getFirst());
        assertEquals("http://.*", list.get(0).getSecond().pattern());

     */
    @Test
    public void testGetFirst() throws Exception {
        try {
            list.getFirst();
            fail();
        } catch (final NoSuchElementException ex) {
            System.out.println(ex);
        }
        list.addFirst("1");
        assertThat(list.getFirst(), is("1"));
    }

    /**
     * @throws Exception
     */
    @Test

    @Override
    public @Nullable E pollLast() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.pollLast();
    }

    @Override
    public E getFirst() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.getFirst();
    }

    @Override
    public E getLast() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.getLast();
    }

    @Override

                .collect(Collectors.groupingBy(Pair::getFirst, Collectors.mapping(Pair::getSecond, Collectors.toList())));
        sourceMap.put("searchField", searchFieldMap);
        final Map<String, List<String>> headerMap = headerList.stream()
                .collect(Collectors.groupingBy(Pair::getFirst, Collectors.mapping(Pair::getSecond, Collectors.toList())));
        sourceMap.put("headers", headerMap);

    delegate().addLast(e);
  }

  @Override
  public Iterator<E> descendingIterator() {
    return delegate().descendingIterator();
  }

  @Override
  @ParametricNullness
  public E getFirst() {
    return delegate().getFirst();
  }

  @Override
  @ParametricNullness
  public E getLast() {
    return delegate().getLast();
  }

  @CanIgnoreReturnValue // TODO(cpovirk): Consider removing this?
  @Override

            final List<String> contentList = new ArrayList<>();
            final String content = pair.getFirst().get(toLowerCase(query));
            if (StringUtil.isNotBlank(content)) {
                contentList.add(content);
            }
            for (final Pair<Pattern, String> regexData : pair.getSecond()) {
                if (regexData.getFirst().matcher(query).matches()) {

                    parseHtmlEncodedChar(text);
                } else if (scanner.lookingAt(HTML_ENTITY)) {
                    parseHtmlEntity(text);
                } else {
                    text.append(scanner.getFirst());
                    scanner.next();
                }
            }

            visitor.onText(text.toString());
        }
        visitor.onEnd();
    }

    private void skipComment() {

            result.setAttributes(source.entrySet().stream().filter(e -> !"name".equals(e.getKey()))
                    .map(e -> new Pair<>(e.getKey(), (String) e.getValue())).collect(Collectors.toMap(Pair::getFirst, Pair::getSecond)));
            return result;
        } catch (InstantiationException | IllegalAccessException e) {
            final String msg = "Cannot create a new instance: " + entityType.getName();