def parse
      settings_path = OOXMLDocumentObject.path_to_folder + 'word/settings.xml'
      return nil unless File.exist?(settings_path)

      doc = parse_xml(settings_path)
      doc.xpath('w:settings/*').each do |node_child|
        case node_child.name
        when 'defaultTabStop'
          @default_tab_stop = OoxmlSize.new.parse(node_child)
        end
      end
      self
    end
def parse
      settings_path = OOXMLDocumentObject.path_to_folder + 'word/settings.xml'
      return nil unless File.exist?(settings_path)

      doc = parse_xml(settings_path)
      doc.xpath('w:settings/*').each do |node_child|
        case node_child.name
        when 'defaultTabStop'
          @default_tab_stop = OoxmlSize.new.parse(node_child)
        end
      end
      self
    end
Parse Settings object
 @return [DocumentSettings] result of parsing