code: def getitem_multilingual(self, i):
      tokens_a, tokens_b, is_next = self.getitem_fixed(i)
      return TokenInstance(
          tokens_a, tokens_b, is_next, lang=self.data_creator.lang[i]
      )
  
imports: from tqdm import tqdm
  from typing import Tuple
  from random import shuffle
  import pickle
  import random
  import numpy
  from pathlib import Path
  from pytorch_pretrained_bert.tokenization import BertTokenizer
label_desc: Use image node_id 2 for calling the NumpyByteInstances obj's underlying member method code with example usage: obj.getitem_multilingual(i) and returns: TokenInstance