def parse(node)
      node.attributes.each do |key, value|
        case key
        when 'idx'
          @index = value.value.to_f
        end
      end

      node.xpath('*').each do |node_child|
        case node_child.name
        when 'v'
          @value = TextValue.new(parent: self).parse(node_child)
        end
      end

      self
    end
def parse(node)
      node.attributes.each do |key, value|
        case key
        when 'idx'
          @index = value.value.to_f
        end
      end

      node.xpath('*').each do |node_child|
        case node_child.name
        when 'v'
          @value = TextValue.new(parent: self).parse(node_child)
        end
      end

      self
    end
Parse PointCount
 @param [Nokogiri::XML:Node] node with PointCount
 @return [PointCount] result of parsing