getAppById example

 catch (ExtensionNotFoundException) {
            return;
        }

        $this->validateExtensionCanBeRemoved($technicalName, $app->getId(), $context);
        $this->appLifecycle->delete($technicalName, ['id' => $app->getId(), 'roleId' => $app->getAclRoleId()], $context, $keepUserData);
    }

    public function removeExtensionAndCancelSubscription(int $licenseId, string $technicalName, string $id, Context $context): void
    {
        $this->validateExtensionCanBeRemoved($technicalName, $id, $context);
        $app = $this->getAppById($id, $context);
        $this->storeClient->cancelSubscription($licenseId, $context);
        $this->appLifecycle->delete($technicalName, ['id' => $id, 'roleId' => $app->getAclRoleId()], $context);
        $this->deleteExtension($technicalName);
    }

    public function deleteExtension(string $technicalName): void
    {
        $this->appLoader->deleteApp($technicalName);
    }

    public function activateExtension(string $technicalName, Context $context): void
    {