class_docstr: Computes BLEU Score.
class_docstr_tok: ["Computes","BLEU","Score","."]
docstr: Sum of list of stats.
docstr_tok: ["Sum","of","list","of","stats","."]
code: def merge_accumulators(
      self, list_of_stats: Iterable[np.ndarray]
  ) -> np.ndarray:
      """Sum of list of stats."""
      return np.sum(list_of_stats, axis=0)
  
file_path: model-analysis/tensorflow_model_analysis/metrics/bleu.py
imports: from typing import Dict, Iterable, Optional
  import apache_beam
  import numpy
  import sacrebleu
  from tensorflow_model_analysis.metrics import metric_types
  from tensorflow_model_analysis.metrics import metric_util
  from tensorflow_model_analysis.proto import config_pb2
label_desc: Use image node_id 4 for calling the _BleuCombiner obj's underlying member method code with example usage: obj.merge_accumulators(list_of_stats) and returns: np