docs: public static <U, S extends 
        UpdatableSummary<U>> UpdatableSketch<U, S> heapifyUpdatableSketch(final Memory mem,
            final SummaryDeserializer<S> deserializer, final SummaryFactory<S> summaryFactory) {
      return new UpdatableSketch<U, S>(mem, deserializer, summaryFactory);
    }