code: def test_global_var_from_arg_func(self):
      x = 1
  
      def g():
          return x + 1
  
      def f(h):
          return h()
  
      _ = f(g)
  
imports: import functools
  import unittest
  from absl.testing import parameterized
  import numpy
  from tensorflow.core.function.capture import free_vars_detect
  from tensorflow.python.util import tf_decorator
label_desc: Use image node_id 28 for calling the FreeVarDetectionTest obj's underlying member method code with example usage: obj.test_global_var_from_arg_func() and returns: unknown, h