rator, optional) —
A random number generator.   return_dict (bool) —
Whether or not to return a SchedulerOutput or tuple.   Returns 
SchedulerOutput or tuple
  
If return_dict is True, ~schedulers.scheduling_ddim.SchedulerOutput is returned, otherwise a
tuple is returned where the first element is the sample tensor.
  Predict the sample from the previous timestep by reversing the SDE. This function propagates the diffusion
process from the lear