public function subscribed_users(user_selector_base $existingusers) {
        $output  = $this->output->box_start('subscriberdiv boxaligncenter');
        $output .= html_writer::tag('p', get_string('forcesubscribed', 'forum'));
        $output .= $existingusers->display(true);
        $output .= $this->output->box_end();
        return $output;
    }
public function subscribed_users(user_selector_base $existingusers) {
        $output  = $this->output->box_start('subscriberdiv boxaligncenter');
        $output .= html_writer::tag('p', get_string('forcesubscribed', 'forum'));
        $output .= $existingusers->display(true);
        $output .= $this->output->box_end();
        return $output;
    }
public function subscribed_users ( user_selector_base $ existingusers ) { $ output = $ this -> output -> box_start ( 'subscriberdiv boxaligncenter' ) ; $ output .= html_writer :: tag ( 'p' , get_string ( 'forcesubscribed' , 'forum' ) ) ; $ output .= $ existingusers -> display ( true ) ; $ output .= $ this -> output -> box_end ( ) ; return $ output ; }
This is used to display a control containing all of the subscribed users so that
it can be searched

@param user_selector_base $existingusers
@return string
This is used to display a control containing all of the subscribed users so that it can be searched