Sets the number of columns for rows inserted in this model. cols must be greater than or equal to 0. This function calls gda_data_model_hash_clear to free the existing rows if any.
the number of columns for rows inserted in model.
See Implementation
Sets the number of columns for rows inserted in this model. cols must be greater than or equal to 0. This function calls gda_data_model_hash_clear to free the existing rows if any.