pagination adding params

What exactly are the parameters? QUERY_STRING /users/1000?option=full ?

Tried building links with added parameters:

``` php
// Existing code setup
$data['body']['pagerLinks'] = $pager->makeLinks(
    $data['body']['page'],    // current page
    $data['body']['perPage'],  // items per page
    $data['body']['ant'],      // total items available
    'default_full',            // pagination template
    0,                        // segment number (assuming default or not needed)
    'page',                    // the URI segment that contains the page number
    true,                      // whether to keep query string
    ['a' => $data['body']['a'], 'b' => $data['body']['b']]    // array of additional query parameters to append
);
```

This gives no error, but additional params (a, b) are not added to links?
Do I need to modify template?
What am I doing wrong?