code: def predict_eps_from_z_and_v(self, x_t, t, v):
      return (
          self.inner_model.sqrt_alphas_cumprod[
              t.to(torch.int), None, None, None
          ]
          * v
          + self.inner_model.sqrt_one_minus_alphas_cumprod[
              t.to(torch.int), None, None, None
          ]
          * x_t
      )
  
imports: import torch
  import inspect
  import sys
  from modules import devices, sd_samplers_common, sd_samplers_timesteps_impl
  from modules.sd_samplers_cfg_denoiser import CFGDenoiser
  from modules.script_callbacks import ExtraNoiseParams, extra_noise_callback
  from modules.shared import opts
  import modules.shared
label_desc: Use image node_id 2 for calling the CompVisTimestepsVDenoiser obj's underlying member method code with example usage: obj.predict_eps_from_z_and_v(x_t, t, v) and returns: unknown