code: def test_fill_quad(self):
      seriesE: TimeSeries = TimeSeries.from_times_and_values(
          self.time,
          np.array(self.cub[:10] + [np.nan] * 10 + self.cub[-10:]),
      )
      assert self.series5 == round(
          fill_missing_values(seriesE, "auto", method="quadratic"), 7
      )
  
file_path: darts/darts/tests/utils/test_missing_values.py
imports: import numpy
  import pandas
  from darts import TimeSeries
  from darts.utils.missing_values import fill_missing_values, missing_values_ratio
label_desc: Use image node_id 5 for calling the TestMissingValues obj's underlying member method code with example usage: obj.test_fill_quad() without return types