docs: function (element) {
        if(!element[0]) return false;
  
        //short-circuit most common case
        if(IS_FA.test(element[0].tagName)) return true;
  
        //otherwise loop through attributes
        var ret = false;
        angular.forEach(element[0].attributes, function(attr){
          ret = ret || IS_FA.test(attr);
        });
        return ret;
      }