code: def objective(trial):
      x = trial.suggest_float("x", -10, 10)
      y = trial.suggest_float("y", -5, 5)
      return x**2 + y
  
file_path: optuna/tutorial/20_recipes/005_user_defined_sampler.py
imports: import numpy
  import optuna
label_desc: Use image node_id 1 for calling a global function with example usage: objective(trial) and returns: unknown