code: def test_get_symbol():
      assert get_symbol("GME") == "GameStop Corp."
      assert get_symbol("GME") != "Globus Medical Inc."
      assert get_symbol("F") == "Ford Motor Company"
      assert get_symbol("ZZZZ") is None
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_get_symbol() without return types