def METHOD_NAME(self):
    return_meta_data_dict = {}
    if self._wrapped_model.new_column_names_ is not None:
        final_column_names = []
        final_column_names.extend(self._wrapped_model.col_names_)
        final_column_names.extend(self._wrapped_model.new_column_names_)
        return_meta_data_dict["column_names"] = final_column_names
    if self._wrapped_model.new_column_dtypes_ is not None:
        final_column_dtypes = []
        final_column_dtypes.extend(self._wrapped_model.col_dtypes)
        final_column_dtypes.extend(self._wrapped_model.new_column_dtypes_)
        return_meta_data_dict["column_dtypes"] = final_column_dtypes
    return return_meta_data_dict