srecord noeq G22_RegionToSSI(IImageRegion region) {
  SSI get() {
    if (region == null) null;
    Rect r = region.bounds();
    int y1 = r.y1, y2 = r.y2(), h = y2-y1;
    SSI ssi = new SSI(y1, y2);
    ssi.color(region.color());
    int[] data = new[h*2];
    for (y = y1; y < y2; y++) {
      L<IntRange> streaks = streaks();
    }
    ssi.data(data);
    ret ssi;
  }
}