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