class_docstr: Base implementation for discriminators composed of sub-discriminators acting at different scales.
      
code: def forward(self, x: torch.Tensor) -> MultiDiscriminatorOutputType:
      ...
  
file_path: audiocraft/audiocraft/adversarial/discriminators/base.py
imports: from abc import ABC, abstractmethod
  import typing
  import torch
  import torch.nn
label_desc: Use image node_id 2 for calling the MultiDiscriminator obj's underlying member method code with example usage: obj.forward(x) without return types