code: def sampler_step(
      self, sigma, next_sigma, denoiser, x, cond, uc, *args, **kwargs
  ):
      raise NotImplementedError
  
imports: from typing import Dict, Union
  import torch
  from omegaconf import ListConfig, OmegaConf
  from tqdm import tqdm
  from ...modules.diffusionmodules.sampling_utils import get_ancestral_step, linear_multistep_coeff, to_d, to_neg_log_sigma, to_sigma
  from ...util import append_dims, default, instantiate_from_config
label_desc: Use image node_id 1 for calling the SingleStepDiffusionSampler obj's underlying member method code with example usage: obj.sampler_step(sigma, next_sigma, denoiser, x, cond, uc) without return types