public function setShipmentOrders($shipmentOrders) {
		if(! is_array($shipmentOrders)) {
			trigger_error(
				'[DHL-PHP-SDK]: The type of $shipmentOrders is NOT an array, but is required to set as array! Called method ' .
				__METHOD__ . ' in class ' . __CLASS__,
				E_USER_ERROR
			);
			$this->addError(__METHOD__ . ': Non-Array value given');

			return;
		}

		$this->shipmentOrders = $shipmentOrders;
	}