code: def test_etreg_preds(precalculated_et_regression_explainer):
      assert isinstance(
          precalculated_et_regression_explainer.preds, np.ndarray
      )
  
imports: import pandas
  import numpy
label_desc: Use image node_id 9 for calling a global function with example usage: test_etreg_preds(precalculated_et_regression_explainer) without return types