|  | @@ 427-433 (lines=7) @@ | 
                                                            
                                    | 424 |  |      * Used to set the saved offset range start date. | 
                                                            
                                    | 425 |  |      * @param DbSafeDateTime|null $start_date | 
                                                            
                                    | 426 |  |      */ | 
                                                            
                                    | 427 |  |     public static function updateStartDateRange(DbSafeDateTime $start_date = null) | 
                                                            
                                    | 428 |  |     { | 
                                                            
                                    | 429 |  |         $date_to_save = $start_date instanceof DbSafeDateTime | 
                                                            
                                    | 430 |  |             ? $start_date->format('U') | 
                                                            
                                    | 431 |  |             : ''; | 
                                                            
                                    | 432 |  |         update_option(self::OPTION_KEY_OFFSET_RANGE_START_DATE, $date_to_save); | 
                                                            
                                    | 433 |  |     } | 
                                                            
                                    | 434 |  |  | 
                                                            
                                    | 435 |  |  | 
                                                            
                                    | 436 |  |     /** | 
                                                                                
                                |  | @@ 461-467 (lines=7) @@ | 
                                                            
                                    | 458 |  |      * Used to set the saved offset range end date. | 
                                                            
                                    | 459 |  |      * @param DbSafeDateTime|null $end_date | 
                                                            
                                    | 460 |  |      */ | 
                                                            
                                    | 461 |  |     public static function updateEndDateRange(DbSafeDateTime $end_date = null) | 
                                                            
                                    | 462 |  |     { | 
                                                            
                                    | 463 |  |         $date_to_save = $end_date instanceof DbSafeDateTime | 
                                                            
                                    | 464 |  |             ? $end_date->format('U') | 
                                                            
                                    | 465 |  |             : ''; | 
                                                            
                                    | 466 |  |         update_option(self::OPTION_KEY_OFFSET_RANGE_END_DATE, $date_to_save); | 
                                                            
                                    | 467 |  |     } | 
                                                            
                                    | 468 |  |  | 
                                                            
                                    | 469 |  |  | 
                                                            
                                    | 470 |  |     /** |