|string> */ public function rules(): array { return [ 'branch_id' => 'required|integer', 'room_name' => 'required|string', 'command' => 'required|string', 'started_at' => 'nullable|date_format:Y-m-d H:i:s', 'ended_at' => 'nullable|date_format:Y-m-d H:i:s', ]; } }