class_docstr: Interface for ResBlock - necessary to make type annotations in ``HiFiGANVocoder.forward`` compatible
  with TorchScript
code: def forward(self, x: torch.Tensor) -> torch.Tensor:
      pass
  
imports: from typing import Tuple
  import torch
  import torch.nn
  import torch.nn.functional
  from torch.nn import Conv1d, ConvTranspose1d
label_desc: Use image node_id 1 for calling the ResBlockInterface obj's underlying member method code with example usage: obj.forward(x) without return types