_cap_v2.   trained_betas (np.ndarray, optional) —
Pass an array of betas directly to the constructor to bypass beta_start and beta_end.   solver_order (int, default 2) —
The UniPC order which can be any positive integer. The effective order of accuracy is solver_order + 1
due to the UniC. It is recommended to use solver_order=2 for guided sampling, and solver_order=3 for
unconditional sampling.   prediction_type (str, defaults to epsilon, optio