code: public static int avalanche(int h) {
      h ^= h >>> 16;
      h *= 0x85ebca6b;
      h ^= h >>> 13;
      h *= 0xc2b2ae35;
      h ^= h >>> 16;
  
      return h;
    }
docs: Force all bits of the hash to avalanche. Used for finalizing the hash.