ma_prev (float) — TODO   sample_hat (torch.FloatTensor) — TODO   sample_prev (torch.FloatTensor) — TODO   derivative (torch.FloatTensor) — TODO   return_dict (bool, optional, defaults to True) —
Whether or not to return a DDPMSchedulerOutput or tuple.   Returns 
prev_sample (TODO)
  
updated sample in the diffusion chain. derivative (TODO): TODO
  Corrects the predicted sample based on the model_output of the network.  KarrasVeOutput  class dif