src/Smalot/Magento/Order/OrderShipment.php
public function addComment($shipmentIncrementId, $comment = null, $email = null, $includeInEmail = null)
    {
        return $this->__createAction('order_shipment.addComment', func_get_args());
    }
public function addComment($shipmentIncrementId, $comment = null, $email = null, $includeInEmail = null)
    {
        return $this->__createAction('order_shipment.addComment', func_get_args());
    }
public function addComment ( $ shipmentIncrementId , $ comment = null , $ email = null , $ includeInEmail = null ) { return $ this -> __createAction ( 'order_shipment.addComment' , func_get_args ( ) ) ; }
Allows you to add a new comment to the order shipment.

@param string $shipmentIncrementId
@param string $comment
@param string $email
@param string $includeInEmail

@return ActionInterface
Allows you to add a new comment to the order shipment .