def parse(node)
      node.attributes.each do |key, value|
        case key
        when 'instr'
          @instruction = value.value.to_s
        end
      end

      node.xpath('*').each do |node_child|
        case node_child.name
        when 'r'
          @runs << ParagraphRun.new(parent: self).parse(node_child)
        end
      end
      self
    end
def parse(node)
      node.attributes.each do |key, value|
        case key
        when 'instr'
          @instruction = value.value.to_s
        end
      end

      node.xpath('*').each do |node_child|
        case node_child.name
        when 'r'
          @runs << ParagraphRun.new(parent: self).parse(node_child)
        end
      end
      self
    end
Parse FieldSimple object
 @param node [Nokogiri::XML:Element] node to parse
 @return [FieldSimple] result of parsing