code: function Cell (node, content) {
    let index = 0
    if (node.parentNode && node.parentNode.childNodes) {
      index = Util.arrayIndexOf(node.parentNode.childNodes, node)
    }
  
    const prefix = (index === 0 ? '| ' : ' ')
    return prefix + content + ' |'
  }
docs: Convert the DOM node to cell text of the table.
  
  @param {Node} node DOM node.
  @param {String} content Content text.
  
  @return {String} Cell text.