/**
* Check if an extension is loaded.
*
* @param string $extensionKey The extension key
*
* @throws \InvalidArgumentException
* @return void
*/
protected function checkExtensionLoaded($extensionKey)
{
if (!$this->installUtility->isLoaded($extensionKey)) {
throw new InvalidArgumentException(sprintf('Extension "%s" is not installed!', $extensionKey));
}
}
