code: def enhance(self, input: torch.Tensor):
      raise NotImplementedError
  
file_path: espnet/espnet2/enh/diffusion/abs_diffusion.py
imports: from abc import ABC, abstractmethod
  from collections import OrderedDict
  from typing import Dict, Optional, Tuple
  import torch
label_desc: Use image node_id 2 for calling the AbsDiffusion obj's underlying member method code with example usage: obj.enhance(input) without return types