text: import torch
  from .abstract import TargetNetwork
  
  
  class TrivialTarget(TargetNetwork):
      def __init__(self):
          self._model = None
  
      def __call__(self, *inputs):
          with torch.no_grad():
              return self._model(*inputs)
  
      def init(self, model):
          self._model = model
  
      def update(self):
          pass
  