docs: private boolean isELReserved(String id) {
          int i = 0;
          int j = reservedWords.length;
          while (i < j) {
              int k = (i + j) / 2;
              int result = reservedWords[k].compareTo(id);
              if (result == 0) {
                  return true;
              }
              if (result < 0) {
                  i = k + 1;
              } else {
                  j = k;
              }
          }
          return false;
      }