code: def _flip(c: str) -> str:
      if c in UPSIDE_DOWN_CHAR_MAPPING:
          return UPSIDE_DOWN_CHAR_MAPPING[c]
      else:
          return c
  
file_path: AugLy/augly/text/augmenters/upside_down.py
imports: from typing import List, Union
  from augly.text.augmenters.utils import detokenize, get_aug_idxes, tokenize, UPSIDE_DOWN_CHAR_MAPPING
  from augly.utils.libsndfile import install_libsndfile
  from nlpaug.augmenter.word import Augmenter
  from nlpaug.util import Action, Method
label_desc: Use image node_id 1 for calling a global function with example usage: _flip(c) and returns: UPSIDE_DOWN_CHAR_MAPPING, c