return null;
        }

        @Override
        public Range<Comparable<?>> span() {
          throw new NoSuchElementException();
        }

        @Override
        public void put(Range<Comparable<?>> range, Object value) {
          checkNotNull(range);
          throw new IllegalArgumentException(
              "Cannot insert range " + range + " into an empty subRangeMap");
        }

        public DateFormat next() {
            if (!hasNext()) {
                throw new NoSuchElementException();
            }
            final int style = STYLES[index++];
            return DateFormat.getDateInstance(style, locale);
        }

        @Override
        public void remove() {
            throw new ClUnsupportedOperationException("remove");
        }

    }

    /**

  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  public void testRemoveAll_unsupportedEmptyCollection() {
    try {
      assertFalse(
          "removeAll(emptyCollection) should return false or throw "
              + "UnsupportedOperationException",
          collection.removeAll(MinimalCollection.of()));
    } catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

        assertThrows(UnknownHostException.class, () -> UniAddress.getAllByName("", false),
                "getAllByName should throw UnknownHostException for empty string");
        assertThrows(UnknownHostException.class, () -> UniAddress.getAllByName(null, false),
                "getAllByName should throw UnknownHostException for null name");
    }

    new Thread(
            new Runnable() {
              @Override
              public void run() {
                try {
                  barrier.await();
                } catch (Exception e) {
                  throw new AssertionError(e);
                }

                dispatcher.dispatch(2, integerSubscribers.iterator());
                latch.countDown();
              }
            })
        .start();

            case HALF_UP:
              return (sign(x) >= 0) ? roundCeilingAsDouble : roundFloorAsDouble;
            default:
              throw new AssertionError("impossible");
          }
        }
    }
    throw new AssertionError("impossible");
  }

    }

    @Override
    public Class<?> next() {
        if (!hasNext()) {
            throw new NoSuchElementException();
        }
        final Class<?> result = clazz;
        clazz = clazz.getSuperclass();
        return result;
    }

    @Override
    public void remove() {
        throw new ClUnsupportedOperationException("remove");
    }

    public static FileInputStream create(final File file) {
        assertArgumentNotNull("file", file);

        try {
            return new FileInputStream(file);
        } catch (final IOException e) {
            throw new IORuntimeException(e);
        }
    }

    /**
     * Gets a byte array from an {@link InputStream}.
     * <p>
     * The input stream is not closed.
     * </p>
     *

            } finally {
                CloseableUtil.close(ois);
            }
        } catch (final IOException ex) {
            throw new IORuntimeException(ex);
        } catch (final ClassNotFoundException ex) {
            throw new ClassNotFoundRuntimeException(ex);
        }
    }

     * @return The transformed ResultData.
     */
    @Override
    public ResultData transform(final ResponseData responseData) {
        if (responseData == null || !responseData.hasResponseBody()) {
            throw new CrawlingAccessException("No response body.");
        }

        final ResultData resultData = new ResultData();
        resultData.setTransformerName(getName());