docstr: Return the noise prediction model.
docstr_tok: ["Return","the","noise","prediction","model","."]
code: def noise_prediction_fn(self, x, t):
      """
      Return the noise prediction model.
      """
      return self.model(x, t)
  
imports: import torch
  import torch.nn.functional
  import math
  from tqdm import tqdm
label_desc: Use image node_id 2 for calling the DPM_Solver obj's underlying member method code with example usage: obj.noise_prediction_fn(x, t) and returns: self