XF 2.1 Help understanding buildLink()

[gaga]

Hello guys
I need some help with buildLink()

'link' => $this->app->router()->buildLink('members', $extra->User),

The code above works and linked to the member profile, but I need to redirect to the member profile #about tab.

Please, someone, help to understand how to build a link in xenforo 2.

Thanks.

 

[Roka]

'link' => $this->app->router()->buildLink('members', $extra->User) . '#about',