code: def mask_token_ids(self):
      return self.tokenizer.mask_token_id
  
file_path: OpenPrompt/tutorial/7_ernie_paddlepaddle/TokenizerWrapper.py
imports: from utils import TokenizerWrapper
  from collections import defaultdict
label_desc: Use image node_id 2 for calling the ErnieMLMTokenizerWrapper obj's underlying member method code with example usage: obj.mask_token_ids() and returns: self