code: def get_mention_id(self) -> str:
      if not self.mention_id:
          self.mention_id = self.gen_mention_id()
      return self.mention_id
  
file_path: nlp-architect/nlp_architect/common/cdc/mention_data.py
imports: import sys
  from typing import List
  from nlp_architect.utils.io import load_json_file
  from nlp_architect.utils.string_utils import StringUtils
label_desc: Use image node_id 6 for calling the MentionData obj's underlying member method code with example usage: obj.get_mention_id() and returns: self