code: def init_accumulator2(self):
      return self.accumulator_cls(2, self.top_ids2, self.dictionary2)
  
imports: import logging
  import unittest
  from gensim.corpora.dictionary import Dictionary
  from gensim.topic_coherence.text_analysis import InvertedIndexAccumulator, WordOccurrenceAccumulator, ParallelWordOccurrenceAccumulator, CorpusAccumulator
  from gensim.test.utils import common_texts
label_desc: Use image node_id 2 for calling the TestParallelWordOccurrenceAccumulator obj's underlying member method code with example usage: obj.init_accumulator2() and returns: self