code: def test_save_method(self):
      fn = next(filename_gen)
      with pytest.warns(PlotnineWarning) as record:
          p.save(fn)
  
      assert_exist_and_clean(fn, "save method")
  
      res = ("saving" in str(item.message).lower() for item in record)
      assert any(res)
  
      res = ("filename" in str(item.message).lower() for item in record)
      assert any(res)
  
      # verbose
      fn = next(filename_gen)
      with warnings.catch_warnings(record=True) as record:
          p.save(fn, verbose=False)
          assert_exist_and_clean(fn, "save method")
          assert not record, "Issued an unexpected warning"
  
imports: import warnings
  from pathlib import Path
  import matplotlib.pyplot
  import pandas
  import pytest
  from plotnine import aes, facet_wrap, geom_point, geom_text, ggplot, ggsave, theme_xkcd
  from plotnine.data import mtcars
  from plotnine.exceptions import PlotnineError, PlotnineWarning
label_desc: Use image node_id 2 for calling the TestArguments obj's underlying member method code with example usage: obj.test_save_method() without return types