# File lib/simplecov/result.rb, line 59
    def missed_lines
      return @missed_lines if @missed_lines
      @missed_lines = 0
      @files.each do |file|
        original_result[file.filename].each do |line_result|
          @missed_lines += 1 if line_result == 0
        end
      end
      @missed_lines
    end