Entry<String, String> next;

                    {
                        advance();
                    }

                    private void advance() {
                        next = null;
                        while (iterator.hasNext()) {
                            Entry<Object, Object> e = iterator.next();
                            if (PropertiesAsMap.matches(e)) {

        buf.append(cause.getMessage()).append(" : [");
        SQLException next = cause.getNextException();
        while (next != null) {
            buf.append(MessageFormatter.getSimpleMessage("ECL0071", next.getMessage(), Integer.toString(next.getErrorCode()),
                    next.getSQLState())).append("], [");
            next = next.getNextException();
        }
        Throwable t = cause.getCause();

      return false;
    }

    Object target = thatIterator.next();
    E current = thisIterator.next();
    try {
      while (true) {
        int cmp = unsafeCompare(current, target);

        if (cmp < 0) {
          if (!thisIterator.hasNext()) {
            return false;
          }
          current = thisIterator.next();
        } else if (cmp == 0) {
          if (!thatIterator.hasNext()) {

        assertThat(i.next(), is("bbb"));
        assertThat(i.next(), is("ccc"));
        assertThat(i.next(), is("aaa"));
        lru.put("ddd", "444");
        assertThat(lru.size(), is(3));
        assertThat(lru.get("bbb"), is(nullValue()));
        i = lru.keySet().iterator();
        assertThat(i.next(), is("ccc"));
        assertThat(i.next(), is("aaa"));
        assertThat(i.next(), is("ddd"));

        return new Iterator<U>() {
            @Override
            public boolean hasNext() {
                return it.hasNext();
            }

            @Override
            public U next() {
                return mapper.apply(it.next());
            }
        };
    }

    @Override
    public int size() {
        return list.size();
    }

    final Runnable runnable;
    final Executor executor;
    @CheckForNull RunnableExecutorPair next;

    RunnableExecutorPair(
        Runnable runnable, Executor executor, @CheckForNull RunnableExecutorPair next) {
      this.runnable = runnable;
      this.executor = executor;
      this.next = next;
    }
  }

     *
     * @param resultSet
     *            結果セット。{@literal null}であってはいけません
     * @return 次に進めたかどうか
     */
    public static boolean next(final ResultSet resultSet) {
        assertArgumentNotNull("resultSet", resultSet);

        try {
            return resultSet.next();
        } catch (final SQLException ex) {
            throw new SQLRuntimeException(ex);
        }
    }

    /**
     * カーソルを指定した位置まで進めます。

    Entry<String, Collection<Integer>> entry = iterator.next();
    assertEquals(null, entry.getKey());
    assertThat(entry.getValue()).containsExactly(7, 3, 1);
    entry = iterator.next();
    assertEquals("tree", entry.getKey());
    assertThat(entry.getValue()).containsExactly(null, 0);
    entry = iterator.next();
    assertEquals("google", entry.getKey());

    }

    @Override
    public boolean hasMoreElements() {
        return iterator.hasNext();
    }

    @Override
    public T nextElement() {
        return iterator.next();
    }

        throw new ClUnsupportedOperationException("remove");
    }

    @Override
    public boolean hasNext() {
        return enumeration.hasMoreElements();
    }

    @Override
    public T next() {
        return enumeration.nextElement();
    }