Add field to "Schedule" for number of backups to keep

Seems the "keep" is still commented out in latest dev. 8.x-4.x-dev
Is this something that we should expect soon? Any problem on this? Because currently the backup cumulate infinitely.
Thanks

/src/Form/ScheduleForm.php line 91

//    $form['keep'] = array(
//      '#type' => 'textfield',
//      '#title' => $this->t('Number to keep'),
//      '#default_value' => $backup_migrate_schedule->get('keep'),
//      '#description' => $this->t('The number of backups to retain. Once this number is reached, the oldest backup will be deleted to make room for the most recent backup. Leave blank to keep all backups.'),
//      '#size' => 10,
//    );