Illuminate\Database\Query\Builder::oldest PHP Method

    public function oldest($column = 'created_at')
    {
        return $this->orderBy($column, 'asc');
    }

 /**
  * Add an "order by" clause for a timestamp to the query.
  *
  * @param string $column
  * @return \Illuminate\Database\Query\Builder|static 
  * @static 
  */
 public static function oldest($column = 'created_at')
 {
     return \Illuminate\Database\Query\Builder::oldest($column);
 }