code: def test_selectormem():
      X = np.array([[1, 2, 3], [4, 5, 6], [10, 10, 10]])
      y = np.array([0, 0, 1])
  
      X_t = preprocessing.SelectorMem().fit_transform(X, y)
      assert X_t.shape != X.shape
  
file_path: sk-dist/skdist/tests/test_preprocessing.py
label_desc: Use image node_id 9 for calling a global function with example usage: test_selectormem() without return types