code: public static int compareTo(final byte [] left, final byte [] right) {
      return LexicographicalComparerHolder.BEST_COMPARER.
          compareTo(left, 0, left.length, right, 0, right.length);
    }
docs: Lexicographically compare two arrays.
  @param left left operand
  @param right right operand
  @return 0 if equal, < 0 if left is less than right, etc.