public function getHelper()
	{
		$config = $this->asConfig();
		if (isset($config))
		{
			$config = ConfigHelper::filterConfig($config, 'PHP');
		}
		else
		{
			// Use a dummy config with a regexp that doesn't match anything
			$config = [
				'attrName' => $this->attrName,
				'regexp'   => '/(?!)/',
				'tagName'  => $this->tagName
			];
		}

		return new Helper($config);
	}