code: def test_convert_matlab_date():
      mlab = [
          733_301.0,
          729_159.0,
          734_471.0,
          737_299.563_296_356_5,
          737_300.000_000_000_0,
      ]
      df = pd.DataFrame(mlab, columns=["dates"]).convert_matlab_date(
          "dates"
      )
  
      assert df["dates"].dtype == "M8[ns]"
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_convert_matlab_date() without return types