public function nthCharacter(int $nth, \Closure $closure) : Manipulator
    {
        $count = 1;
        $modifiedString = '';

        foreach (str_split($this->string) as $character) {
            $modifiedString .= $count === $nth ? $closure($character) : $character;
            $count++;
        }

        return new static($modifiedString);
    }