PaymentCollection::isExistsInnerPayment

public function isExistsInnerPayment()
{
	if ($paySystemId = PaySystemManager::getInnerPaySystemId())
	{
		/** @var Payment $payment */
		foreach ($this->collection as $payment)
		{
			if ($payment->getPaymentSystemId() == $paySystemId)
				return true;
		}
	}

	return false;
}