def METHOD_NAME(precalculated_rf_classifier_explainer):
    precalculated_rf_classifier_explainer.pos_label = 1
    precalculated_rf_classifier_explainer.pos_label = "Not survived"
    assert isinstance(precalculated_rf_classifier_explainer.pos_label, int)
    assert isinstance(precalculated_rf_classifier_explainer.pos_label_str, str)
    assert (precalculated_rf_classifier_explainer.pos_label == 0)
    assert (precalculated_rf_classifier_explainer.pos_label_str == "Not survived")