addNotifierSection example

$this->addPhpErrorsSection($rootNode);
        $this->addExceptionsSection($rootNode);
        $this->addWebLinkSection($rootNode, $enableIfStandalone);
        $this->addLockSection($rootNode, $enableIfStandalone);
        $this->addSemaphoreSection($rootNode, $enableIfStandalone);
        $this->addMessengerSection($rootNode, $enableIfStandalone);
        $this->addSchedulerSection($rootNode, $enableIfStandalone);
        $this->addRobotsIndexSection($rootNode);
        $this->addHttpClientSection($rootNode, $enableIfStandalone);
        $this->addMailerSection($rootNode, $enableIfStandalone);
        $this->addSecretsSection($rootNode);
        $this->addNotifierSection($rootNode, $enableIfStandalone);
        $this->addRateLimiterSection($rootNode, $enableIfStandalone);
        $this->addUidSection($rootNode, $enableIfStandalone);
        $this->addHtmlSanitizerSection($rootNode, $enableIfStandalone);
        $this->addWebhookSection($rootNode, $enableIfStandalone);
        $this->addRemoteEventSection($rootNode, $enableIfStandalone);

        return $treeBuilder;
    }

    private function addSecretsSection(ArrayNodeDefinition $rootNode): void
    {