code: def get(self, name: str):
      if name not in self._data_dict:
          raise IndexError(
              "Can not load the data without registration !"
          )
      return self[name]
  
imports: from recbole.evaluator.register import Register
  import torch
  import copy
label_desc: Use image node_id 6 for calling the DataStruct obj's underlying member method code with example usage: obj.get(name) and returns: self