public function getHandler($extension)
	{
		if (isset($this->handlers[$extension]))
		{
			return $this->handlers[$extension];
		}

		$class = 'Fuel\Config\Handler\\'.ucfirst($extension);

		if ( ! class_exists($class, true))
		{
			throw new \RuntimeException('Could not find config handler for extension: '.$extension);
		}

		$handler = new $class;
		$this->handlers[$extension] = $handler;

		return $handler;
	}