def parse(node)
      node.xpath('*').each do |node_child|
        case node_child.name
        when 'blip'
          @file_reference = FileReference.new(parent: self).parse(node_child)
        when 'tile'
          @tile = Tile.new(OOXMLCoordinates.parse(node_child, x_attr: 'tx', y_attr: 'ty'),
                           OOXMLCoordinates.parse(node_child, x_attr: 'sx', y_attr: 'sy'),
                           parent: self).parse(node_child)
        end
      end
      self
    end
def parse(node)
      node.xpath('*').each do |node_child|
        case node_child.name
        when 'blip'
          @file_reference = FileReference.new(parent: self).parse(node_child)
        when 'tile'
          @tile = Tile.new(OOXMLCoordinates.parse(node_child, x_attr: 'tx', y_attr: 'ty'),
                           OOXMLCoordinates.parse(node_child, x_attr: 'sx', y_attr: 'sy'),
                           parent: self).parse(node_child)
        end
      end
      self
    end
Parse ImageFill object
 @param node [Nokogiri::XML:Element] node to parse
 @return [ImageFill] result of parsing