code: def teardown_class(cls):
      if pdf_output:
          cls.pdf.close()
  
file_path: statsmodels/statsmodels/sandbox/tests/test_predict_functional.py
imports: from statsmodels.sandbox.predict_functional import predict_functional
  import numpy
  import pandas
  import pytest
  import statsmodels.api
label_desc: Use image node_id 2 for calling the TestPredFunc obj's underlying member method code with example usage: obj.teardown_class(cls) without return types