code: public static HashFunction[] createHashFunctions(final int seed,
              final int num) {
          final HashFunction[] hashFunctions = new HashFunction[num];
          for (int i = 0; i < num; i++) {
              hashFunctions[i] = Hashing.murmur3_128(seed + i);
          }
          return hashFunctions;
      }
docs: Create hash functions.
  
  @param seed a base seed
  @param num the number of hash functions.
  @return