code: def test_call(self):
      source = "foo(a)"
      self.assertDepends(
          source,
          {("foo", "a"), ("a", "foo")},
          {"a", "foo"},
      )
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import unittest
  import ast
  from ...asttools.visitors.graph_visitor import GraphGen
  from ...asttools.visitors.graph_visitor import DiGraph
  from ...asttools.tests import AllTypesTested, skip_networkx
label_desc: Use image node_id 17 for calling the Test obj's underlying member method code with example usage: obj.test_call() without return types