attributes['lineinfo_uid'] ?? null; } public function getOldClientInfoUID(): int|null { return $this->attributes['old_clientinfo_uid'] ?? null; } //기본기능 public function getIP(): string { return $this->attributes['ip']; } //abstract 선언처리용 public function getUsed(): int { return 0; } public function getAvailable(): int { return 0; } }