assertInstanceOf(BuilderChainable::class, $result); } public function testOpSpecialOrder() { $this->expectException(\InvalidArgumentException::class); $this->expectExceptionCode(268546002); $result = $this->opSpecialOrder('errororderid', 2); } public function testDemo() { $result = $this->domesticRefunds('20250904123534022660', '20250904123534022660', 0.01); dump($result); } }