def parse(node)
      node.xpath('*').each do |series_child|
        case series_child.name
        when 'strRef'
          @string = NumberStringReference.new(parent: self).parse(series_child)
        end
      end
      self
    end
def parse(node)
      node.xpath('*').each do |series_child|
        case series_child.name
        when 'strRef'
          @string = NumberStringReference.new(parent: self).parse(series_child)
        end
      end
      self
    end
Parse Order
 @param [Nokogiri::XML:Node] node with Order
 @return [Order] result of parsing