private function detectIndent(Tokens $tokens, $index)
    {
        if (!$tokens[$index - 1]->isWhitespace()) {
            return ''; // cannot detect indent
        }

        $explodedContent = explode("\n", $tokens[$index - 1]->getContent());

        return end($explodedContent);
    }
private function detectIndent(Tokens $tokens, $index)
    {
        if (!$tokens[$index - 1]->isWhitespace()) {
            return ''; // cannot detect indent
        }

        $explodedContent = explode("\n", $tokens[$index - 1]->getContent());

        return end($explodedContent);
    }
@param Tokens $tokens
@param int    $index

@return string