e DPMSolver order which can be 1 or 2 or 3. It is recommended to use solver_order=2 for guided
sampling, and solver_order=3 for unconditional sampling.   prediction_type (str, defaults to epsilon, optional) —
Prediction type of the scheduler function; can be epsilon (predicts the noise of the diffusion process),
sample (directly predicts the noisy sample) or v_prediction` (see section 2.4 of Imagen
Video paper).   thresholding (bool, defaults t