code: def test_four_arguments():
      with tm.assert_produces_warning(FutureWarning):
          assert f(1, 2, 3, 4) == 10
  
imports: import inspect
  from pandas.util._decorators import deprecate_nonkeyword_arguments
  import pandas._testing
label_desc: Use image node_id 8 for calling a global function with example usage: test_four_arguments() without return types