code: def convert_to_unicode(text):
      """Converts `text` to Unicode (if it's not already), assuming utf-8 input."""
      if isinstance(text, str):
          return text
      elif isinstance(text, bytes):
          return text.decode("utf-8", "ignore")
      else:
          raise ValueError(f"Unsupported string type: {type(text)}")
  
imports: import os
  import unicodedata
  from typing import Any, Dict, List, Optional, Tuple
  import sentencepiece
  from ...tokenization_utils import AddedToken, PreTrainedTokenizer
  from ...utils import logging
label_desc: Use image node_id 4 for calling a global function with example usage: convert_to_unicode(text) and returns: text, text