code: def __del__(self):
      print("Destroying SquadForBERTTensorizerForKD object")
      print(
          f"SquadForBERTTensorizerForKD: Number of rows read: {self.total}"
      )
      print(
          f"SquadForBERTTensorizerForKD: Number of rows dropped: {self.mismatches}"
      )
  
imports: import itertools
  from typing import List
  import torch
  from pytext.data.bert_tensorizer import BERTTensorizer
  from pytext.data.roberta_tensorizer import RoBERTaTensorizer
  from pytext.data.tensorizers import lookup_tokens
  from pytext.data.utils import pad_and_tensorize
  from pytext.torchscript.tensorizer import ScriptRoBERTaTensorizerWithIndices
  from pytext.torchscript.vocab import ScriptVocabulary
label_desc: Use image node_id 3 for calling the SquadForBERTTensorizerForKD obj's underlying member method code with example usage: obj.__del__() without return types