PHPStorm suggestions of dynamic class declaration

I’m using PHPStorm, and I have a class like this.

class MasterClass {
    public function getClass($className)
    {
        require_once("/php/class/$className.php");
        $newClass = new $className();
        return $newClass;
    }
}

And I call this method in my PHP file like this.

$MasterClass = new MasterClass();
$roles = $MasterClass->getClass('Roles');
$roles->

But of course, my IDE cannot show suggestions/function usage with this solution.
Is it possible to show suggestions using something like PhpDoc? I found a solution for the function usage using @see classname::method(), but I have to do it for all the methods I called.

Thank you

I tried with

/** @link Roles */
$roles = $MasterClass->getClass('Roles');

or

/** @see Roles */
$roles = $MasterClass->getClass('Roles');