code: def _sample_func(*, a: int, b: int, c: int) -> int:
      return a + b + c
  
file_path: optuna/tests/test_convert_positional_args.py
imports: import re
  from typing import List
  import pytest
  from optuna._convert_positional_args import convert_positional_args
label_desc: Use image node_id 1 for calling a global function with example usage: _sample_func() and returns: unknown