code: def _get_pareto_front_trials(
      study: "optuna.study.Study",
  ) -> List[FrozenTrial]:
      return _get_pareto_front_trials_by_trials(
          study.trials, study.directions
      )
  
file_path: optuna/optuna/study/_multi_objective.py
imports: from typing import List
  from typing import Optional
  from typing import Sequence
  import optuna
  from optuna.study._study_direction import StudyDirection
  from optuna.trial import FrozenTrial
  from optuna.trial import TrialState
label_desc: Use image node_id 4 for calling a global function with example usage: _get_pareto_front_trials(study) and returns: _get_pareto_front_trials_by_trials