class_docstr: Base class.
class_docstr_tok: ["Base","class","."]
code: def __init__(self, fold, storage_name, sep, column_description):
      self._fold = fold
      self._storage_name = storage_name
      self._column_description = column_description
      self._sep = sep
      self._size = 0
  
imports: from __future__ import print_function
  import os
  from ..None import CatBoostError
  from ..eval.log_config import get_eval_logger
  from .utils import make_dirs_if_not_exists
label_desc: Use image node_id 2 to create a new FoldStorage object from inherited base classes: object with example: obj = FoldStorage(fold, storage_name, sep, column_description)