code: def test_coalesce_with_title():
      s = pd.Series(
          [1, 2, 3, 5, 5], index=["a", "b", "c", "d", "e"]
      ).toset()
  
      assert isinstance(s, set)
      assert len(s) == 4
      assert s == set([1, 2, 3, 5])
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_coalesce_with_title() without return types