/**
* Add a shipping method to this collection.
*
* @param MethodInterface $method The shipping method to add
*
* @return MethodCollection Returns $this for chainability
*
* @throws \InvalidArgumentException If a shipping method with the same name
* has already been set on this collection
*/
public function add(MethodInterface $method)
{
if (isset($this->methods[$method->getName()])) {
throw new \InvalidArgumentException(sprintf('Shipping method `%s` is already defined', $method->getName()));
}
$this->_methods[$method->getName()] = $method;
return $this;
}
/**
* Set the shipping method to use for the order.
*
* @param Shipping\MethodInterface $option Shipping method to use
*/
public function setShipping(Shipping\MethodInterface $option)
{
$this->_order->shippingName = $option->getName();
$this->_order->shippingDisplayName = $option->getDisplayName();
$this->_order->shippingListPrice = $option->getPrice();
return $this->dispatchEvent();
}