private function validateServicesDefined() {
        if(!$this->getDi()->has(AclInterface::DI_NAME)) {
            throw new \Exception('Service ' . AclInterface::class . '::DI_NAME must be defined with a type of: ' . AclInterface::class);
        }
        if(!$this->getDi()->has(OutputInterface::DI_NAME)) {
            throw new \Exception('Service ' . OutputInterface::class . '::DI_NAME must be defined with a type of: ' . OutputInterface::class);
        }
    }