/**
	 * Get a registry path if the return value is a string
	 *
	 * @param  string       $path     Registry path (e.g. joomla.content.showauthor)
	 * @param  string|null  $default  A default value
	 *
	 * @return  string|null
	 * @since 3.2.0
	 */
	public function getString(string $path, ?string $default = null): ?string
	{
		// Return default value if path is empty
		if (empty($path))
		{
			return $default;
		}

		// get the value
		if (($node = $this->get($path)) !== null
			&& is_string($node)
			&& strlen((string) $node) > 0)
		{
			return $node;
		}

		return $default;
	}