# File lib/rye/set.rb, line 60
60:     def add_box(*boxes)
61:       boxes = boxes.flatten.compact
62:       @boxes += boxes.collect do |box|
63:         box = Rye::Box.new(box, @opts) if box.is_a?(String)
64:         box.add_keys(@keys)
65:         box
66:       end
67:       self
68:     end