private function getIssetInfo(Tokens $tokens, $index)
    {
        $openIndex = $tokens->getNextMeaningfulToken($index);

        $braceOpenCount = 1;
        $meaningfulTokenIndexes = [$openIndex];

        for ($i = $openIndex + 1;; ++$i) {
            if ($tokens[$i]->isWhitespace() || $tokens[$i]->isComment()) {
                continue;
            }

            $meaningfulTokenIndexes[] = $i;

            if ($tokens[$i]->equals(')')) {
                --$braceOpenCount;
                if (0 === $braceOpenCount) {
                    break;
                }
            } elseif ($tokens[$i]->equals('(')) {
                ++$braceOpenCount;
            }
        }

        return $meaningfulTokenIndexes;
    }
private function getIssetInfo(Tokens $tokens, $index)
    {
        $openIndex = $tokens->getNextMeaningfulToken($index);

        $braceOpenCount = 1;
        $meaningfulTokenIndexes = [$openIndex];

        for ($i = $openIndex + 1;; ++$i) {
            if ($tokens[$i]->isWhitespace() || $tokens[$i]->isComment()) {
                continue;
            }

            $meaningfulTokenIndexes[] = $i;

            if ($tokens[$i]->equals(')')) {
                --$braceOpenCount;
                if (0 === $braceOpenCount) {
                    break;
                }
            } elseif ($tokens[$i]->equals('(')) {
                ++$braceOpenCount;
            }
        }

        return $meaningfulTokenIndexes;
    }
@param Tokens $tokens
@param int    $index  of T_ISSET

@return int[] indexes of meaningful tokens belonging to the isset statement