code: def test_xgbreg_mean_abs_shap(precalculated_xgb_regression_explainer):
      assert isinstance(
          precalculated_xgb_regression_explainer.get_mean_abs_shap_df(),
          pd.DataFrame,
      )
  
imports: import pandas
  import numpy
label_desc: Use image node_id 6 for calling a global function with example usage: test_xgbreg_mean_abs_shap(precalculated_xgb_regression_explainer) without return types