docstr: Retrieve the actual dataset represented by the sentinel
  
  Returns
  -------
  object
      The dataset for which the sentinel was being used as a placeholder
docstr_tok: ["Retrieve","the","actual","dataset","represented","by","the","sentinel","Returns","--","--","--","-","object","The","dataset","for","which","the","sentinel","was","being","used","as","a","placeholder"]
code: def retrieve_by_sentinel(self):
      """Retrieve the actual dataset represented by the sentinel
  
      Returns
      -------
      object
          The dataset for which the sentinel was being used as a placeholder
      """
      kind, chunk = self.dataset_type.split("_")
      dataset: BaseDataset = getattr(
          G.Env.current_task, "data_{}".format(kind)
      )
      return getattr(dataset, chunk).T.fold
  
file_path: hyperparameter_hunter/hyperparameter_hunter/sentinels.py
imports: from hyperparameter_hunter.data.data_core import BaseDataset
  from hyperparameter_hunter.settings import G
  from hyperparameter_hunter.utils.boltons_utils import remap
  from abc import ABCMeta, abstractmethod
label_desc: Use image node_id 3 for calling the DatasetSentinel obj's underlying member method code with example usage: obj.retrieve_by_sentinel() and returns: getattr