docs: function() {  // {{{3
      if (! (this.demand.filter && this.demand.filter.root)) {
        return;
      }
  
      var parentDir = this.demand.filter.root;
  
      if (parentDir === '/') return;
  
      parentDir = parentDir.split('/');
      parentDir.pop();
      parentDir = parentDir.join('/');
  
      var that = this;
  
      this.li({'focusable': undefined})
        .on('tap', function(ev) {
          that.update({filter: {root: parentDir}});
          return false;
        })
        .h3('..')
      ;
    }