code: def test_objectmapper(self):
      df = pdml.ModelFrame([])
      self.assertIs(df.pipeline.Pipeline, pipeline.Pipeline)
      self.assertIs(df.pipeline.FeatureUnion, pipeline.FeatureUnion)
      self.assertIs(df.pipeline.make_pipeline, pipeline.make_pipeline)
      self.assertIs(df.pipeline.make_union, pipeline.make_union)
  
file_path: pandas-ml/pandas_ml/skaccessors/test/test_pipeline.py
imports: import sklearn.datasets
  import sklearn.decomposition
  import sklearn.pipeline
  import pandas_ml
  import pandas_ml.util.testing
label_desc: Use image node_id 1 for calling the TestPipeline obj's underlying member method code with example usage: obj.test_objectmapper() without return types