code: def test_glob_numpy_var(self):
      a = 0
      b = np.asarray(1)
  
      def f():
          c = np.asarray(2)
          res = a + b + c
          return res
  
      func_map = free_vars_detect._detect_function_free_vars(f)
      self.assertIn("f", func_map.keys())
      free_vars = get_var_name(func_map["f"])
      self.assertSequenceEqual(free_vars, ["a", "b"])
  
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 13 for calling the FreeVarDetectionTest obj's underlying member method code with example usage: obj.test_glob_numpy_var() and returns: res