class_docstr: Back Translation with hugging-face translation models.
  A sentence can only be transformed into one sentence at most.
class_docstr_tok: ["Back","Translation","with","hugging-face","translation","models",".","A","sentence","can","only","be","transformed","into","one","sentence","at","most","."]
code: def __repr__(self):
      return "BackTrans"
  
file_path: textflint/textflint/generation/transformation/UTCN/cn_back_trans.py
imports: import torch
  from ..transformation import Transformation
  from ....common import device
  from ....common.settings import CN_TRANS_FROM_MODEL, CN_TRANS_TO_MODEL
label_desc: Use image node_id 2 for calling the BackTrans obj's underlying member method code with example usage: obj.__repr__() and returns: str