code: def get_size(self):
      return len(self.word_list)
  
imports: import os
  import re
  from collections import Counter
  from itertools import chain
  import torch
  from mmf.common.registry import registry
  from mmf.utils.file_io import PathManager
  from mmf.utils.general import get_absolute_path
label_desc: Use image node_id 5 for calling the VocabDict obj's underlying member method code with example usage: obj.get_size() and returns: len