onSchedulerOutput or tuple
  
If return_dict is True, VQDiffusionSchedulerOutput is
returned, otherwise a tuple is returned where the first element is the sample tensor.
  Predict the sample from the previous timestep by the reverse transition distribution. See
q_posterior() for more details about how the distribution is computer.  VQDiffusionSchedulerOutput  class diffusers.schedulers.scheduling_vq_diffusion.VQDiffusionSchedulerOutput  < sourc