def all
      Dir.glob("#{@dir}/**/*.xml").sort.map do |f|
        File.read(f, encoding: "utf-8")
      end
    end
def all
      Dir.glob("#{@dir}/**/*.xml").sort.map do |f|
        File.read(f, encoding: "utf-8")
      end
    end
Returns all items
 @return [Array<Hash>]