code: def test_preprocessing_dtype(self):
      super(NoneComponentTest, self)._test_preprocessing_dtype(
          NoPreprocessing
      )
  
imports: import numpy
  from autosklearn.pipeline.components.feature_preprocessing.no_preprocessing import NoPreprocessing
  from autosklearn.pipeline.util import PreprocessingTestCase, _test_preprocessing
label_desc: Use image node_id 2 for calling the NoneComponentTest obj's underlying member method code with example usage: obj.test_preprocessing_dtype() without return types