code: def _encoder_forward(self, input_ids, attention_mask):
      return self.encoder(input_ids, attention_mask)[0]
  
imports: import copy
  import itertools
  from typing import List, Optional, Tuple
  import torch
  import torch.nn.functional
  from transformers import BartConfig
  from transformers.generation_utils import GenerationMixin
label_desc: Use image node_id 3 for calling the BARTGenerator obj's underlying member method code with example usage: obj._encoder_forward(input_ids, attention_mask) and returns: self