code: def __init__(self, input_spec: FeatureMapsSpecification):
      super().__init__(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 1 to create a new AbstractHead object from inherited base classes: AbstractDecoder with example: obj = AbstractHead(input_spec)