code: def forward(self, past_target: torch.Tensor) -> torch.Tensor:
      pass
  
file_path: gluonts/src/gluonts/nursery/SCott/model/ar/ar_network.py
imports: from typing import List
  import torch
  import torch.nn
label_desc: Use image node_id 2 for calling the ARPredictionNetwork obj's underlying member method code with example usage: obj.forward(past_target) without return types