code: static DirectCompactUnorderedSketch wrapInstance(final Memory srcMem, final long seed) {
      final short memSeedHash = srcMem.getShort(SEED_HASH_SHORT);
      final short computedSeedHash = computeSeedHash(seed);
      checkSeedHashes(memSeedHash, computedSeedHash);
      return new DirectCompactUnorderedSketch(srcMem);
    }
docs: Wraps the given Memory, which must be a SerVer 3, unordered, Compact Sketch image.
  Must check the validity of the Memory before calling.
  @param srcMem <a href="{@docRoot}/resources/dictionary.html#mem">See Memory</a>
  @param seed <a href="{@docRoot}/resources/dictionary.html#seed">See Update Hash Seed</a>.
  @return this sketch