Google\Cloud\PubSub\Topic::iam PHP 메소드

    public function iam()
    {
        return $this->iam;
    }

 public function testIam()
 {
     $topic = new Topic($this->connection->reveal(), 'topic-name', 'project-name');
     $this->assertInstanceOf(Iam::class, $topic->iam());
 }