PayPal\Api\InvoiceItem::getImageUrl PHP Метод

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

 /**
  * @depends testSerializationDeserialization
  * @param InvoiceItem $obj
  */
 public function testGetters($obj)
 {
     $this->assertEquals($obj->getName(), "TestSample");
     $this->assertEquals($obj->getDescription(), "TestSample");
     $this->assertEquals($obj->getQuantity(), "12.34");
     $this->assertEquals($obj->getUnitPrice(), CurrencyTest::getObject());
     $this->assertEquals($obj->getTax(), TaxTest::getObject());
     $this->assertEquals($obj->getDate(), "TestSample");
     $this->assertEquals($obj->getDiscount(), CostTest::getObject());
     $this->assertEquals($obj->getImageUrl(), "http://www.google.com");
     $this->assertEquals($obj->getUnitOfMeasure(), "TestSample");
 }