private function getSiblingContinuousSingleLineComment(Tokens $tokens, $index, $after)
    {
        $siblingIndex = $index;
        do {
            if ($after) {
                $siblingIndex = $tokens->getNextTokenOfKind($siblingIndex, [[T_COMMENT]]);
            } else {
                $siblingIndex = $tokens->getPrevTokenOfKind($siblingIndex, [[T_COMMENT]]);
            }

            if (null === $siblingIndex) {
                return null;
            }
        } while (0 === strpos($tokens[$siblingIndex]->getContent(), '/*'));

        $newLines = 0;
        for ($i = min($siblingIndex, $index) + 1, $max = max($siblingIndex, $index); $i < $max; ++$i) {
            if ($tokens[$i]->isWhitespace() && Preg::match('/\R/', $tokens[$i]->getContent())) {
                if (1 === $newLines || Preg::match('/\R.*\R/', $tokens[$i]->getContent())) {
                    return null;
                }

                ++$newLines;
            }
        }

        return $siblingIndex;
    }
private function getSiblingContinuousSingleLineComment(Tokens $tokens, $index, $after)
    {
        $siblingIndex = $index;
        do {
            if ($after) {
                $siblingIndex = $tokens->getNextTokenOfKind($siblingIndex, [[T_COMMENT]]);
            } else {
                $siblingIndex = $tokens->getPrevTokenOfKind($siblingIndex, [[T_COMMENT]]);
            }

            if (null === $siblingIndex) {
                return null;
            }
        } while (0 === strpos($tokens[$siblingIndex]->getContent(), '/*'));

        $newLines = 0;
        for ($i = min($siblingIndex, $index) + 1, $max = max($siblingIndex, $index); $i < $max; ++$i) {
            if ($tokens[$i]->isWhitespace() && Preg::match('/\R/', $tokens[$i]->getContent())) {
                if (1 === $newLines || Preg::match('/\R.*\R/', $tokens[$i]->getContent())) {
                    return null;
                }

                ++$newLines;
            }
        }

        return $siblingIndex;
    }
@param Tokens $tokens
@param int    $index
@param bool   $after

@return null|int