code: def get_vocab_size(vocab_file_path):
      """Get vocab size."""
      vocab_dict = load_vocab_dict(vocab_file_path)
      return len(vocab_dict)
  
file_path: delta/delta/data/preprocess/utils.py
imports: import os
  import pickle
  import collections
  import numpy
  from absl import logging
  import delta.compat
  from delta.data.utils.vocabulary import Vocabulary
label_desc: Use image node_id 5 for calling a global function with example usage: get_vocab_size(vocab_file_path) and returns: len