def parse(node)
      node.xpath('*').each do |child_node|
        case child_node.name
        when 'from'
          @from = XlsxDrawingPositionParameters.new(parent: self).parse(child_node)
        when 'to'
          @to = XlsxDrawingPositionParameters.new(parent: self).parse(child_node)
        when 'sp'
          @shape = DocxShape.new(parent: self).parse(child_node)
        when 'grpSp'
          @grouping = ShapesGrouping.new(parent: self).parse(child_node)
        when 'pic'
          @picture = DocxPicture.new(parent: self).parse(child_node)
        when 'graphicFrame'
          @graphic_frame = GraphicFrame.new(parent: self).parse(child_node)
        when 'cxnSp'
          @shape = ConnectionShape.new(parent: self).parse(child_node)
        end
      end
      self
    end
def parse(node)
      node.xpath('*').each do |child_node|
        case child_node.name
        when 'from'
          @from = XlsxDrawingPositionParameters.new(parent: self).parse(child_node)
        when 'to'
          @to = XlsxDrawingPositionParameters.new(parent: self).parse(child_node)
        when 'sp'
          @shape = DocxShape.new(parent: self).parse(child_node)
        when 'grpSp'
          @grouping = ShapesGrouping.new(parent: self).parse(child_node)
        when 'pic'
          @picture = DocxPicture.new(parent: self).parse(child_node)
        when 'graphicFrame'
          @graphic_frame = GraphicFrame.new(parent: self).parse(child_node)
        when 'cxnSp'
          @shape = ConnectionShape.new(parent: self).parse(child_node)
        end
      end
      self
    end
Parse XlsxDrawing object
 @param node [Nokogiri::XML:Element] node to parse
 @return [XlsxDrawing] result of parsing