code: def test_preprocessing_dtype(self):
      with ignore_warnings(feature_preprocessing_warnings):
          super()._test_preprocessing_dtype(
              LibLinear_Preprocessor, test_sparse=False
          )
  
file_path: auto-sklearn/test/test_pipeline/components/feature_preprocessing/test_liblinear.py
imports: import sklearn.metrics
  from sklearn.linear_model import RidgeClassifier
  from autosklearn.pipeline.components.feature_preprocessing.liblinear_svc_preprocessor import LibLinear_Preprocessor
  from autosklearn.pipeline.util import PreprocessingTestCase, _test_preprocessing, get_dataset
  from test.test_pipeline.ignored_warnings import feature_preprocessing_warnings, ignore_warnings
label_desc: Use image node_id 3 for calling the LiblinearComponentTest obj's underlying member method code with example usage: obj.test_preprocessing_dtype() without return types