inline bitset_t Groups::Nbs(const Group& group, HexColor color) const
{
    return GetGroup(group.Captain()).Nbs(HexColorSetUtil::Only(color));
}
inline bitset_t Groups::Nbs(const Group& group, HexColorSet colorset) const
{
    return GetGroup(group.Captain()).Nbs(colorset);
}
inline bitset_t Groups::Nbs(const Group& group) const
{
    return GetGroup(group.Captain()).Nbs();
}