docs: @Override
      public int compareTo(IntsRef other) {
          if (this == other) return 0;
          final int[] aInts = this.ints;
          int aUpto = this.offset;
          final int[] bInts = other.ints;
          int bUpto = other.offset;
          final int aStop = aUpto + Math.min(this.length, other.length);
          while (aUpto < aStop) {
              int aInt = aInts[aUpto++];
              int bInt = bInts[bUpto++];
              if (aInt > bInt) {
                  return 1;
              } else if (aInt < bInt) {
                  return -1;
              }
          }
          // One is a prefix of the other, or, they are equal:
          return this.length - other.length;
      }