code: def backbone(self):
      return self.model.base_model
  
imports: import os
  import warnings
  from dataclasses import dataclass
  from types import FunctionType
  from typing import Any, Callable, Dict
  import torch
  from torch import Tensor
  from flash.core.adapter import Adapter, AdapterTask
  from flash.core.data.io.input import DataKeys
  from flash.core.heads import CLASSIFIER_HEADS
  from flash.core.model import Task
  from flash.core.registry import FlashRegistry
  from flash.core.utilities.imports import _TRANSFORMERS_AVAILABLE
  from flash.text.classification.collate import TextClassificationCollate
label_desc: Use image node_id 3 for calling the HuggingFaceAdapter obj's underlying member method code with example usage: obj.backbone() and returns: self