code: def __call__(self, x: torch.Tensor, sigma: float) -> torch.Tensor:
      pass
  
imports: import logging
  from abc import ABC, abstractmethod
  from typing import Dict, List, Optional, Tuple, Union
  import torch
  from einops import rearrange, repeat
  from ...util import append_dims, default
label_desc: Use image node_id 1 for calling the Guider obj's underlying member method code with example usage: obj.__call__(x, sigma) without return types