code: def get_input_spec(self):
      return self.input_spec
  
imports: import dataclasses
  from abc import abstractmethod
  from typing import Protocol, Tuple, List, Union, Mapping, Callable
  import numpy
  import torch.jit
  from torch import nn, Tensor
  from pytorch_toolbelt.utils import pytorch_toolbelt_deprecated
label_desc: Use image node_id 4 for calling the AbstractDecoder obj's underlying member method code with example usage: obj.get_input_spec() and returns: self