def parse(node)
      node.xpath('*').each do |node_child|
        case node_child.name
        when 'tx'
          node_child.xpath('c:rich/*').each do |rich_node_child|
            case rich_node_child.name
            when 'p'
              root_object.default_font_style = FontStyle.new(true) # Default font style for chart title always bold
              @elements << Paragraph.new(parent: self).parse(rich_node_child)
              root_object.default_font_style = FontStyle.new
            end
          end
        when 'layout'
          @layout = option_enabled?(node_child)
        when 'overlay'
          @overlay = option_enabled?(node_child)
        end
      end
      self
    end
def parse(node)
      node.xpath('*').each do |node_child|
        case node_child.name
        when 'tx'
          node_child.xpath('c:rich/*').each do |rich_node_child|
            case rich_node_child.name
            when 'p'
              root_object.default_font_style = FontStyle.new(true) # Default font style for chart title always bold
              @elements << Paragraph.new(parent: self).parse(rich_node_child)
              root_object.default_font_style = FontStyle.new
            end
          end
        when 'layout'
          @layout = option_enabled?(node_child)
        when 'overlay'
          @overlay = option_enabled?(node_child)
        end
      end
      self
    end
Parse ChartAxisTitle object
 @param node [Nokogiri::XML:Element] node to parse
 @return [ChartAxisTitle] result of parsing