sixel_dither_get_num_of_histgram_colors(
    sixel_dither_t /* in */ *dither)  /* dither context object */
{
    return sixel_dither_get_num_of_histogram_colors(dither);
}
sixel_dither_get_num_of_histgram_colors(
    sixel_dither_t   *dither)   
{
    return sixel_dither_get_num_of_histogram_colors(dither);
}