anchor.diff:        api.files.list(orderBy: 'createdTime desc', q: "'0B2t1uXRrSZ4SQXpZd3JoYjFKaTQ' in parents", pageSize: pageSize)
           .then((list) {
           window.console.log('0B2t1uXRrSZ4SQXpZd3JoYjFKaTQ');
  -        files.addAll(toFileList(list.files, true));
  +        files.addAll(toFileList(list.files, true, 'images/private-16.png'));
   
           files.sort((a, b) => b.timestamp.compareTo(a.timestamp));
           removeDocument();
  
positive.code:         api.files.list(orderBy: 'createdTime desc', q: "'0B7gIZmKENAt5ejZKOFR0b2hQVU0' in parents", pageSize: pageSize)
            .then((list) {
            window.console.log('0B7gIZmKENAt5ejZKOFR0b2hQVU0');
            files.addAll(toFileList(list.files, true));
  
            files.sort((a, b) => b.timestamp.compareTo(a.timestamp));
            removeDocument();
  
negative.code:     api.files.list(orderBy: 'createdTime desc', q: "'0B7gIZmKENAt5SERvaW9uVGhPd1k' in parents", pageSize: pageSize)
        .then((list) {
        window.console.log('0B7gIZmKENAt5SERvaW9uVGhPd1k');
        files.addAll(toFileList(list.files, false, null));
  
        files.sort((a, b) => b.timestamp.compareTo(a.timestamp));
        removeDocument();
  