code: def fit(
      self,
      trials: List[FrozenTrial],
  ) -> None:
      pass
  
file_path: optuna/optuna/terminator/improvement/gp/base.py
imports: import abc
  from typing import List
  from typing import Tuple
  import numpy
  from optuna._experimental import experimental_class
  from optuna.trial._frozen import FrozenTrial
label_desc: Use image node_id 1 for calling the BaseGaussianProcess obj's underlying member method code with example usage: obj.fit(trials) without return types