code: function() {
  
        var x, sortable, els;
  
        els = document.querySelectorAll('[hashedit-sortable]');
  
        // walk through sortable clases
        for (x = 0; x < els.length; x += 1) {
  
          if(els[x].firstElementChild === null){
            els[x].setAttribute('hashedit-empty', 'true');
          }
          else {
            els[x].removeAttribute('hashedit-empty');
          }
  
        }
  
      }
docs: Sets up empty
  @param {Array} sortable