code: def get_data_item_for_reference_key(self, data_item_reference_key: str=None, create_if_needed: bool=False, large_format: bool=False) -> DataItem:
          
          ...
docs: Get the data item associated with data item reference key. Optionally create if missing.
  
          :param data_item_reference_key: The data item reference key.
          :param create_if_needed: Whether to create a new data item if none is found.
          :return: The associated data item. May be None.
  
          .. versionadded:: 1.0
  
          Status: Provisional
          Scriptable: Yes