code: def _listify(self, item, dim_trigger=None):
      if item is None:
          return []
  
      if not isinstance(item, (list, tuple)):
          return [item]
  
      if (
          isinstance(item, (list, tuple))
          and self.num_dim(item) == dim_trigger
      ):
          item = [item]
      return item
  
file_path: chitra/chitra/coordinates.py
imports: from typing import TYPE_CHECKING, List, Optional, Tuple, Union
  import numpy
  from imgaug.augmentables import bbs
label_desc: Use image node_id 2 for calling the BoundingBoxes obj's underlying member method code with example usage: obj._listify(item, dim_trigger) and returns: item, list, list