code: def forward(
      self,
      pixel_values,
      output_hidden_states: Optional[bool] = None,
      output_attentions: Optional[bool] = None,
      return_dict: Optional[bool] = None,
  ):
      raise NotImplementedError(
          "This method should be implemented by the derived class."
      )
  
imports: import enum
  import inspect
  from typing import Iterable, List, Optional, Tuple, Union
label_desc: Use image node_id 11 for calling the BackboneMixin obj's underlying member method code with example usage: obj.forward(pixel_values, output_hidden_states, output_attentions, return_dict) without return types