docs: function iterateWriteLinkedList () {
      if (!isIterating()) { return undefined; }
  
      let data = iterateData;
      let content = iterateData.item.content;
  
      data.item = data.item.next;
  
      if (data.item === null) {
          resetIterateData();
  
          writable.write(content, 'utf8', onWriteFinish);
      } else {
          writable.write(content, 'utf8', iterateWriteLinkedList);
      }
  }