* @param array2
     *            the second array
     * @return {@literal true} if the two arrays are equal, ignoring the order of elements
     */
    public static <T> boolean equalsIgnoreSequence(final T[] array1, final T[] array2) {
        if (array1 == null && array2 == null) {
            return true;
        } else if (array1 == null || array2 == null) {
            return false;
        }