[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify code snippets into one of the following categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']."}, {'role': 'user', 'content': "Identify the single most appropriate category to which the provided code belongs. Provide your response as a single category label without any additional information, commentary, or personal opinions.\\nPython Code:plt.figure(figsize=(8, 5))\nplot_custom_roc_curve('Logistic Regression', y_test, logistic_reg.decision_function(X_test_transformed))\nplot_custom_roc_curve('Random Forest', y_test, forest_clf.predict_proba(X_test_transformed)[:,1])\nplot_custom_roc_curve('XGBoost', y_test, xgb_clf.predict_proba(X_test_transformed)[:,1])\nplot_custom_roc_curve('CatBoost', y_test, catboost_clf.predict_proba(X_cb_test_transformed)[:,1])\nplot_custom_roc_curve('Soft Voting', y_test, voting_reg.predict_proba(X_test)[:,1])\nplt.show()"}, {'role': 'assistant', 'content': 'helper_functions'}]