[IL71] Add indices to toCodePointArray.

    private static final int[] EMPTY_CODEPOINTS = {};

    public static int[] toCodePointArray(final String string) {

        return toCodePointArray(string, 0, string.length());

    }

    public static int[] toCodePointArray(final String string,

            final int startIndex, final int endIndex) {

        final int length = string.length();

        if (length <= 0) {

            return EMPTY_CODEPOINTS;

        }

        final int[] codePoints = new int[string.codePointCount(0, length)];

        final int[] codePoints = new int[string.codePointCount(startIndex, endIndex)];

        int destIndex = 0;

        for (int index = 0; index < length; index = string.offsetByCodePoints(index, 1)) {

        for (int index = startIndex; index < endIndex;

                index = string.offsetByCodePoints(index, 1)) {

            codePoints[destIndex] = string.codePointAt(index);

            destIndex++;

        }