# File lib/benelux/stats.rb, line 49
49:     def +(other)
50:       if !other.is_a?(Benelux::Stats)
51:         raise TypeError, "can't convert #{other.class} into Stats" 
52:       end
53:       s = self.clone
54:       other.names.each do |name|
55:         s.add_group name
56:         s.group(name) << other.group(name)
57:       end
58:       s
59:     end