public function getLoader()
{
if (null === $this->loader) {
$locator = new FileLocator($this->paths);
$resolver = new LoaderResolver(array(new YamlFileLoader($locator), new PhpFileLoader($locator), new IniFileLoader($locator), new ArrayLoader()));
$this->loader = new DelegatingLoader($resolver);
}
return $this->loader;
}