code: def get_estimator(self, cat_cols):
      return cb.CatBoostRegressor(
          verbose=True,
          loss_function="RMSE",
          thread_count=16,
          cat_features=cat_cols,
      )
  
file_path: catboost/catboost/benchmarks/kaggle/rossmann-store-sales/catboost_experiment_sklearn_grid_cv.py
imports: import os.path
  import numpy
  import config
  import experiment_lib
  import catboost
label_desc: Use image node_id 2 for calling the CatBoostExperimentGridSearchCV obj's underlying member method code with example usage: obj.get_estimator(cat_cols) and returns: cb