Location information for tags

I am using this package in the open PHP language server, which provides static analysis for any IDE through the open language server protocol. One of these features is "Go to Definition". This is currently implemented for the actual PHP code through nikic's great PHPParser, where every node has a file start/end offset so I can calculate which node the user clicked. It would be nice to have this feature for types in docblock tags like @var too, but the tags don't have any start/end offset data. Would it be possible to add this?