public GroupDescription(Group group) : base(group)
 {
     GroupTypeName = group.GroupTypeName;
     FreeExp = group.FreeExp;
     ExpCost = group.ExpCost;
     WoundsBase = group.WoundsBase;
     Stats = group.Stats;
     Traits = group.Traits.Select(t => (EntityDescription)t);
     Freebies = group.Freebies.Select(f => (FreebieDescription)f);
     Skills = group.Skills;
 }
 public bool AddGroup(Group group) => group.Add(this);