code: @JmxGetter(name = "getChunkIdToNumChunks", description = "Returns a string representation of the map of chunk id to number of chunks")
      public String getChunkIdToNumChunks() {
          StringBuilder builder = new StringBuilder();
          for(Entry<Object, Integer> entry: fileSet.getChunkIdToNumChunks().entrySet()) {
              builder.append(entry.getKey().toString() + " - " + entry.getValue().toString() + ", ");
          }
          return builder.toString();
      }
docs: Returns a string representation of map of chunk id to number of chunks
  
  @return String of map of chunk id to number of chunks