# File lib/sass/selector/abstract_sequence.rb, line 93
      def _specificity(arr)
        min = 0
        max = 0
        arr.each do |m|
          next if m.is_a?(String)
          spec = m.specificity
          if spec.is_a?(Range)
            min += spec.begin
            max += spec.end
          else
            min += spec
            max += spec
          end
        end
        min == max ? min : (min..max)
      end