code: def vocab_size(self):
      return self.column_codes[self.columns[-1]].end_id
  
imports: import math
  from typing import Dict, List, Tuple
  import numpy
  from numpy import ndarray
  from sklearn.preprocessing import PowerTransformer, QuantileTransformer, RobustScaler
  from nemo.utils import logging
label_desc: Use image node_id 2 for calling the ColumnCodes obj's underlying member method code with example usage: obj.vocab_size() and returns: self