# File lib/chef/node/attribute.rb, line 170
      def each_value(&block)
        get_keys.each do |key|
          value = determine_value(
            get_value(automatic, key),
            get_value(override, key),
            get_value(normal, key),
            get_value(default, key)
          )
          block.call(value)
        end
      end