Shipment/Gateway/AbstractGateway.php
protected function throwUnsupportedAction($operation, $reason = null)
    {
        throw new ShipmentGatewayException(sprintf(
            "The shipment gateway '%s' does not support '%s' operation. %s",
            $this->getName(), $operation, $reason
        ));
    }
protected function throwUnsupportedAction($operation, $reason = null)
    {
        throw new ShipmentGatewayException(sprintf(
            "The shipment gateway '%s' does not support '%s' operation. %s",
            $this->getName(), $operation, $reason
        ));
    }
Throws an unsupported operation exception.

@param string $operation
@param string $reason

@throws ShipmentGatewayException