    # File lib/compass/sass_extensions/functions/constants.rb, line 59
        def opposite_position(position)
          opposite = position.value.split(/ +/).map do |pos|
            case pos
            when "top" then "bottom"
            when "bottom" then "top"
            when "left" then "right"
            when "right" then "left"
            when "center" then "center"
            else
              pos
            end
          end
          Sass::Script::String.new(opposite.join(" "), position.type)
        end