mple: FloatTensor = None noise: Optional = None **kwargs  ) → torch.FloatTensor  Parameters   model_output (torch.FloatTensor) —
The direct output from the learned diffusion model.   sample (torch.FloatTensor) —
A current instance of a sample created by the diffusion process.   Returns 
torch.FloatTensor
  
The sample tensor at the previous timestep.
  One step for the first-order DPMSolver (equivalent to DDIM).  multistep_dpm_solver_second_ord