code: def absolute_discounting_trigram_model(
      trigram_training_data, vocabulary
  ):
      model = AbsoluteDiscountingInterpolated(
          order=3, vocabulary=vocabulary
      )
      model.fit(trigram_training_data)
      return model
  
imports: import math
  from operator import itemgetter
  import pytest
  from nltk.lm import MLE, AbsoluteDiscountingInterpolated, KneserNeyInterpolated, Laplace, Lidstone, StupidBackoff, Vocabulary, WittenBellInterpolated
  from nltk.lm.preprocessing import padded_everygrams
label_desc: Use image node_id 26 for calling a global function with example usage: absolute_discounting_trigram_model(trigram_training_data, vocabulary) and returns: model