about property annotation some question

i read Phosphorum code , See this code in PostsPollOptionsfile.

 * Post's Poll Options Model
 * @property Posts post
 * @method static PostsPollOptions findFirstById(int $id)
 * @method Posts getPost($parameters = null)
 * @package Phosphorum\Models

It is not a note ,You can actually use.... but i not found the related documents..help...

edited Oct '16

Those are just PHPDoc annotations. Not related to framework anyhow. https://phpdoc.org/docs/latest/glossary.html