protected function findCommentTagIndexes(File $file, $commentStart, $tagName)
    {
        $indexes = [];
        $tokens  = $file->getTokens();

        foreach ($tokens[$commentStart]['comment_tags'] as $index) {
            if ($tokens[$index]['content'] === $tagName) {
                $indexes[] = $index;
            }
        }

        return $indexes;
    }