Recurly_Usage::build PHP Метод

    public static function build($subUuid, $addOnCode, $client = null)
    {
        $usage = new self(null, $client);
        $usage->subUuid = $subUuid;
        $usage->addOnCode = $addOnCode;
        return $usage;
    }

 public function testCreateUsage()
 {
     $this->client->addResponse('POST', '/subscriptions/012345678901234567890123456789ab/add_ons/marketing_emails/usage', 'usage/create-201.xml');
     $usage = Recurly_Usage::build('012345678901234567890123456789ab', 'marketing_emails', $this->client);
     $usage->create();
     $this->assertInstanceOf('Recurly_Usage', $usage);
     $this->assertInstanceOf('Recurly_Stub', $usage->measured_unit);
 }