* @param bool $runValidation whether to perform validation (calling [[validate()]])
* before saving the record. Defaults to `true`. If the validation fails, the record
* will not be saved to the database and this method will return `false`.
* @param array $attributeNames list of attribute names that need to be saved. Defaults to null,
* meaning all attributes that are loaded from DB will be saved.
* @return bool whether the saving succeeded (i.e. no validation errors occurred).
*/
public function save($runValidation = true, $attributeNames = null)