pekka

 public function saved(Task $task): void
    {
        
        if ($task->isDirty('attachment')) {

            $originalFieldContents = $task->getOriginal('attachment');
            $newFieldContents = $task->attachment;

            # We attempt to JSON decode the field. If it is an array, this is an indication we have ->multiple() activated
            $originalFieldContentsDecoded = json_decode($task->getOriginal('attachment'));