code: public static int compare(final long first, final long second) {
          return compareLongs(first + Long.MIN_VALUE, second + Long.MIN_VALUE);
      }
docs: Equivalent of Long.compareUnsigned in Java 8.
  
  @param first  the first value
  @param second the second value
  @return 0 if the values are equal, a value greater than zero if first is greater than second,
  a value less than zero if first is less than second