src/Ovh/Cloud/Cloud.php
public function postInstanceReboot($idInstance, $type){
        return json_decode(self::getClient()->postInstanceReboot($this->passport, $idInstance, $type));
    }
public function postInstanceReboot($idInstance, $type){
        return json_decode(self::getClient()->postInstanceReboot($this->passport, $idInstance, $type));
    }
POST Reboot Instance
POST /cloud/project/{serviceName}/instance/{instanceId}/reboot

@return