class_docstr: API for merging sharded DatasetFeatureStatisticsList.
class_docstr_tok: ["API","for","merging","sharded","DatasetFeatureStatisticsList","."]
code: def expand(self, stats: beam.PCollection):
      return (
          stats
          | "MergeDatasetFeatureStatisticsProtos"
          >> beam.CombineGlobally(
              merge_util.merge_dataset_feature_statistics_list
          )
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import random
  from typing import Generator, Text, Optional
  import apache_beam
  import pyarrow
  from tensorflow_data_validation.utils import artifacts_io_impl
  from tensorflow_data_validation.statistics import stats_impl
  from tensorflow_data_validation.statistics import stats_options
  from tfx_bsl.statistics import merge_util
  from tensorflow_metadata.proto.v0 import statistics_pb2
label_desc: Use image node_id 1 for calling the MergeDatasetFeatureStatisticsList obj's underlying member method code with example usage: obj.expand(stats) and returns: unknown