PayPal\Api\Sale::getId PHP Method

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

 public function testGetterSetter()
 {
     $this->assertEquals(self::$createTime, $this->sale->getCreateTime());
     $this->assertEquals(self::$id, $this->sale->getId());
     $this->assertEquals(self::$parentPayment, $this->sale->getParentPayment());
     $this->assertEquals(self::$state, $this->sale->getState());
     $this->assertEquals(AmountTest::$currency, $this->sale->getAmount()->getCurrency());
 }