addColumn QueryMethod anonymous function comming as array instead of object.

[raheelkhan]

$column = new \Chumper\Datatable\Columns\FunctionColumn('user_id', function ($row) { return link_to('users/'.$row->user_id, $row->username) }
    Datatable::query(DB::table('table')->select(array('user_id', 'username')))
             ->showColumns('user_id')
             ->addColumn($column)
             ->orderColumns('user_id')
             ->searchColumns('user_id')

In the above code where the $column is being instantiated, i am getting $row['username'] instead of $row->username.

Am i doing something wrong ?