setThreadKey example

$cardV2,
            ],
        ];

        $this->assertSame($expected, $options->toArray());
    }

    public function testOptionsWithThread()
    {
        $thread = 'fgh.ijk';
        $options = new GoogleChatOptions();
        $options->setThreadKey($thread);
        $this->assertSame($thread, $options->getThreadKey());
        $options->setThreadKey(null);
        $this->assertNull($options->getThreadKey());
    }
}