}

    /**
     * Returns the first value.
     *
     * @return The first value
     */
    public T1 getFirst() {
        return first;
    }

    /**
     * Sets the first value.
     *
     * @param first
     *            The first value
     */
    public void setFirst(final T1 first) {
        this.first = first;
    }

    /**
     * Returns the second value.
     *

            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;
            }

     */
    @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

        defaultResponseHeaders.forEach(header -> callback.accept(header.getFirst(), header.getSecond()));
        final List<Pair<String, String>> headers = responseHeaderMap.get(mimeType);
        if (headers != null) {
            headers.forEach(header -> callback.accept(header.getFirst(), header.getSecond()));
        }
    }

                .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);

    @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

            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()) {

                    .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();

 */
public class TestEntity {
    private String title;

    private String body;

    private List<String> list;

    public List<String> getList() {
        return list;
    }

    public void setList(final List<String> list) {
        this.list = list;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(final String title) {
        this.title = title;
    }