PayPal\Api\Sale::getParentPayment PHP Method

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

 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());
 }