docs: public static SetOperation heapify(final Memory srcMem, final long seed) {
      final byte famID = srcMem.getByte(FAMILY_BYTE);
      final Family family = idToFamily(famID);
      switch (family) {
        case UNION : {
          return UnionImpl.heapifyInstance(srcMem, seed);
        }
        case INTERSECTION : {
          return IntersectionImpl.heapifyInstance(srcMem, seed);
        }
        default: {
          throw new SketchesArgumentException("SetOperation cannot heapify family: "
              + family.toString());
        }
      }
    }