	/**
	 * Unique Code/Strings
	 *
	 * @var array
	 * @since 3.2.0
	 */
	protected static array $unique = [];

	/**
	 * Unique Areas Code/Strings
	 *
	 * @var array
	 * @since 3.2.0
	 */
	protected static array $areas = [];

	/**
	 * Creating an unique local key
	 *
	 * @param   int       $size    The key size
	 *
	 * @return  string  The unique local key
	 *
	 */
	public static function get($size): string
	{
		$unique = (isset(self::$unique[$size])) ? end(self::$unique[$size]) : null;

		if(!$unique)
		{
			$unique = substr("vvvvvvvvvvvvvvvvvvvvvvvvvvvvvv", 0, $size);

			self::$unique[$size] = [];
		}

		while(in_array($unique, self::$unique[$size]))
		{
			$unique++;
		}

		self::$unique[$size][] = $unique;

		return $unique;
	}

	/**
	 * Creating an Unique Code
	 * 
	 * @param   string  $code
	 * @param   string  $target
	 *
	 * @return  string
	 * @since 3.2.0
	 */
	public static function code(string $code, string $target = 'both'): string
	{
		if (!isset(self::$areas[$target])
			|| !in_array(
				$code, self::$areas[$target]
			))
		{
			self::$areas[$target][] = $code;

			return $code;
		}

		// make sure it is unique
		return self::code($code . self::get(1));
	}
