PaymentCollection::getItemForAutoEdit

private function getItemForAutoEdit($previousOrderSum) :? Payment
{
	if ($this->isAllowAutoEdit())
	{
		/** @var Payment $payment */
		foreach ($this as $payment)
		{
			if ($payment->getSum() === $previousOrderSum)
			{
				return $payment;
			}
		}
	}

	return null;
}