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

      node.xpath('*').each do |num_level_child|
        case num_level_child.name
        when 'start'
          @start = ValuedChild.new(:integer, parent: self).parse(num_level_child)
        when 'numFmt'
          @numbering_format = NumberingFormat.new(parent: self).parse(num_level_child)
        when 'lvlText'
          @text = LevelText.new(parent: self).parse(num_level_child)
        when 'lvlJc'
          @justification = LevelJustification.new(parent: self).parse(num_level_child)
        when 'pPr'
          @paragraph_properties = ParagraphProperties.new(parent: self).parse(num_level_child)
        when 'rPr'
          @run_properties = RunProperties.new(parent: self).parse(num_level_child)
        when 'suff'
          @suffix = @suffix.parse(num_level_child)
        end
      end

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

      node.xpath('*').each do |num_level_child|
        case num_level_child.name
        when 'start'
          @start = ValuedChild.new(:integer, parent: self).parse(num_level_child)
        when 'numFmt'
          @numbering_format = NumberingFormat.new(parent: self).parse(num_level_child)
        when 'lvlText'
          @text = LevelText.new(parent: self).parse(num_level_child)
        when 'lvlJc'
          @justification = LevelJustification.new(parent: self).parse(num_level_child)
        when 'pPr'
          @paragraph_properties = ParagraphProperties.new(parent: self).parse(num_level_child)
        when 'rPr'
          @run_properties = RunProperties.new(parent: self).parse(num_level_child)
        when 'suff'
          @suffix = @suffix.parse(num_level_child)
        end
      end

      self
    end
Parse Numbering Level data
 @param [Nokogiri::XML:Element] node with Numbering Level data
 @return [NumberingLevel] value of Numbering Level data