public static function execute($paymentId, $payerId, PayPal\Rest\ApiContext $apiContext)
 {
     #Logger
     CLogger::getInstance()->add(__LINE__, __CLASS__, 'payment_id', $paymentId);
     CLogger::getInstance()->add(__LINE__, __CLASS__, 'payer_id', $payerId);
     $payment = \PayPal\Api\Payment::get($paymentId, $apiContext);
     self::_setIndent($payment);
     $execution = PaymentExecution::execute($payerId);
     return self::_process($payment, $apiContext, $execution);
 }