List<String> list = newArrayList();
    list.add("a");
    list.add("b");
    Iterator<String> iterator = list.iterator();
    assertEquals("b", get(iterator, 1));
    assertFalse(iterator.hasNext());
  }

  public void testGet_atSize() {
    List<String> list = newArrayList();
    list.add("a");
    list.add("b");
    Iterator<String> iterator = list.iterator();
    try {

        final List<String> list = new ArrayList<>(fields.length + 10);
        stream(fields).of(stream -> stream.forEach(list::add));
        split(getQueryAdditionalResponseFields(), ",")
                .of(stream -> stream.filter(StringUtil::isNotBlank).map(String::trim).forEach(list::add));
        return list.toArray(new String[list.size()]);
    }

    String getQueryAdditionalScrollResponseFields();

            Map<Object, Object> result = Maps.newHashMap();
            for (Object key : keys) {
              Object value = new Object();
              result.put(key, value);
              // add extra entries
              result.put(value, key);
            }
            return result;
          }
        };
    LoadingCache<Object, Object> cache = CacheBuilder.newBuilder().build(loader);

        if (functionsLambda != null) {
            functionsLambda.callback((cqLambda, scoreFunctionBuilder) -> {
                ClickLogCQ cf = new ClickLogCQ();
                cqLambda.callback(cf);
                list.add(new FilterFunctionBuilder(cf.getQuery(), scoreFunctionBuilder));
            });
        }
        final FunctionScoreQueryBuilder builder = regFunctionScoreQ(cq.getQuery(), list);
        if (opLambda != null) {

        if (functionsLambda != null) {
            functionsLambda.callback((cqLambda, scoreFunctionBuilder) -> {
                PathMappingCQ cf = new PathMappingCQ();
                cqLambda.callback(cf);
                list.add(new FilterFunctionBuilder(cf.getQuery(), scoreFunctionBuilder));
            });
        }
        final FunctionScoreQueryBuilder builder = regFunctionScoreQ(cq.getQuery(), list);
        if (opLambda != null) {

            functionsLambda.callback((cqLambda, scoreFunctionBuilder) -> {
                FileAuthenticationCQ cf = new FileAuthenticationCQ();
                cqLambda.callback(cf);
                list.add(new FilterFunctionBuilder(cf.getQuery(), scoreFunctionBuilder));
            });
        }
        final FunctionScoreQueryBuilder builder = regFunctionScoreQ(cq.getQuery(), list);
        if (opLambda != null) {

                    list.add(interimResult);
                }
                return list;
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }

        private <T> Set<T> concat(Set<T> set, T elem) {
            Set<T> newSet = new HashSet<>(set);
            newSet.add(elem);
            return newSet;
        }

    try {
      map.subMap("a", "z").keySet().add("a");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
    try {
      map.tailMap("a").keySet().add("a");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
    try {
      map.headMap("r").keySet().add("a");
      fail();
    } catch (UnsupportedOperationException expected) {
    }

    try {
      map.subMap("a", "z").keySet().add("a");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
    try {
      map.tailMap("a").keySet().add("a");
      fail();
    } catch (UnsupportedOperationException expected) {
    }
    try {
      map.headMap("r").keySet().add("a");
      fail();
    } catch (UnsupportedOperationException expected) {
    }

    protected boolean usePipeline = false;

    public void addIndexConfig(final String path) {
        indexConfigList.add(path);
    }

    public void addConfigFile(final String index, final String path) {
        configListMap.computeIfAbsent(index, k -> new ArrayList<>()).add(path);
    }

    public void setSettings(final Map<String, String> settings) {
        this.settings = settings;
    }