code: def test_positional_arg(path_to_pickled_model):
      exec_args = [
          "m2cgen",
          "--language",
          "python",
          str(path_to_pickled_model),
      ]
      execute_test(exec_args)
  
file_path: m2cgen/tests/e2e/test_cli.py
imports: from platform import system
  import pytest
  from tests import utils
label_desc: Use image node_id 2 for calling a global function with example usage: test_positional_arg(path_to_pickled_model) without return types