# File lib/rye/set.rb, line 75
75:     def add_keys(*additional_keys)
76:       additional_keys = additional_keys.flatten.compact
77:       @opts[:keys] ||= []
78:       @opts[:keys] += additional_keys
79:       @opts[:keys].uniq!
80:       @boxes.each do |box|
81:         box.add_keys *additional_keys
82:       end
83:       self
84:     end