code: def getString(self, stringId):
      assert stringId in self.idToMessage, (
          "Missing string id : " + stringId
      )
      return self.idToMessage[stringId]
  
file_path: PaddleOCR/PPOCRLabel/libs/stringBundle.py
imports: import re
  import os
  import sys
  import locale
  from libs.ustr import ustr
label_desc: Use image node_id 3 for calling the StringBundle obj's underlying member method code with example usage: obj.getString(stringId) and returns: self