code: public <T> DistinctBufferMaker<T> createDistinctBuffer( Serializer<T> distinctSerializer ) {
          return new MakeDistinctBuffer<T>("buffer-" + dbCounter.incrementAndGet(), distinctSerializer);
      }
docs: Obtain a maker object that can create a new {@link DistinctBuffer}.
  
  @param distinctSerializer the serializer for the distinct value
  @return the maker; never null