code: def test_actual_kwarg(self):
      @argmap(lambda x: -x, "arg")
      def foo(*, arg):
          return arg
  
      assert foo(arg=3) == -3
  
imports: import os
  import pathlib
  import random
  import tempfile
  import pytest
  import networkx
  from networkx.utils.decorators import argmap, not_implemented_for, np_random_state, open_file, py_random_state
  from networkx.utils.misc import PythonRandomInterface
label_desc: Use image node_id 7 for calling the TestArgmap obj's underlying member method code with example usage: obj.test_actual_kwarg() and returns: arg