code: def get_fold_id(self):
      return self._id
  
file_path: catboost/catboost/python-package/catboost/eval/_fold_model.py
imports: import os
  from ..None import CatBoostError, CatBoost
label_desc: Use image node_id 5 for calling the FoldModel obj's underlying member method code with example usage: obj.get_fold_id() and returns: self