}

    /**
     * Removes the specified element from this set if it is present.
     *
     * @param o
     *            object to be removed from this set, if present.
     * @return true if the set contained the specified element.
     */
    @Override
    public boolean remove(final Object o) {
        return map.remove(o) == PRESENT;
    }

    /**

        return map.containsKey(o);
    }

    @Override
    public boolean add(final String o) {
        return map.put(o, PRESENT) == null;
    }

    @Override
    public boolean remove(final Object o) {
        return map.remove(o) == PRESENT;
    }

    @Override
    public void clear() {
        map.clear();
    }

    }

    public void mymodifyProperty(String propertyName) {
        registerModifiedProperty(propertyName);
    }

    public void mymodifyPropertyCancel(String propertyName) {
        __modifiedProperties.remove(propertyName);
    }

    public void clearModifiedInfo() {
        __modifiedProperties.clear();
    }

    public boolean hasModification() {
        return !__modifiedProperties.isEmpty();
    }

        }
        final ClassLoader result = classLoader;
        classLoader = classLoader.getParent();
        return result;
    }

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

        } catch (final IndexOutOfBoundsException e) {
            throw new NoSuchElementException("index=" + index);
        }
    }

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

        exception.expect(ClUnsupportedOperationException.class);
        exception.expectMessage(is("remove"));
        final Vector<String> vector = new Vector<String>();
        vector.add("a");
        final EnumerationIterator<String> itr = new EnumerationIterator<String>(vector.elements());
        itr.remove();
    }

    /**
     * @throws Exception
     */
    @Test

            return parent.toArray(a);
        }

        public boolean add(final E e) {
            return parent.add(e);
        }

        public boolean remove(final Object o) {
            return parent.remove(o);
        }

        public boolean containsAll(final Collection<?> c) {
            return parent.containsAll(c);
        }

    }

    @Override
    public void putAll(final Map<? extends Object, ? extends Object> t) {
        getProperties().putAll(t);
    }

    @Override
    public Object remove(final Object key) {
        return getProperties().remove(key);
    }

    @Override
    public void save(final OutputStream out, final String comments) {
        throw new UnsupportedOperationException("Unsupported operation.");
    }

                paramMap.put(HcHttpClient.PROXY_CREDENTIALS_PROPERTY, new UsernamePasswordCredentials(
                        paramMap.remove(Param.Client.PROXY_USERNAME).toString(), paramMap.remove(Param.Client.PROXY_PASSWORD).toString()));
            }
        } else {
            initializeDefaultHttpProxy(paramMap);
        }

        crawlerClientFactory = factory;

        crawlingInfoHelper.putToInfoMap(Constants.DATA_INDEX_SIZE, Long.toString(indexUpdateCallback.getDocumentSize()));

        for (final String sid : sessionIdList) {
            // remove config
            ComponentUtil.getCrawlingConfigHelper().remove(sid);
        }

    }

    protected static class DataCrawlingThread extends Thread {

        private final DataConfig dataConfig;