/**
* Get Topic models Pager
*
* @param int $limit Per page limit
* @return \Illuminate\Pagination\LengthAwarePaginator
*/
public static function getTopic($limit = 15)
{
$Topic = new Topic();
$Topic->builder = $Topic->query();
$Topic->selectCategory();
$Topic->applyFilter();
return $Topic->builder->paginate($limit);
}