/**
* @param plotter
* @return
*/
public static Color getUniqueColor(
IRegion.RegionType type, IRegionSystem plotter, Collection<Color> colours) {
final Collection<Color> used = new HashSet<Color>(7);
for (IRegion reg : plotter.getRegions()) {
if (reg.getRegionType() != type) continue;
used.add(reg.getRegionColor());
}
for (Color color : colours) {
if (!used.contains(color)) return color;
}
return colours.iterator().next();
}
