docs: function() {
          var arr = this.undef;
          var len = arr.length;
          var temp;
          while (len--) {
              temp = arr[len];
              if (!defined(temp)) {
                  if ((regIsCSS.test(temp) || regIsJS.test(temp)) && _.loaded(temp)) {
                      continue;
                  }
                  return false;
              }
          }
          return true;
      }