Define filterable and/or sortable admin columns in extened class

Hi,

if I see correctly, I can't use fields in the admin columns that are inside a group field. At least the output remains empty for me.

But that isnt't a big problem for me, because I have build a Plugin for extending a Custom Post Type following your example in the documentation:

class Prefix_Custom_Admin_Columns extends \MBAC\Post {
    public function columns( $columns ) {
        $columns  = parent::columns( $columns );
        $position = '';
        $target   = '';
        $this->add( $columns, 'column_id', 'Column Title', $position, $target );
        // Add more if you want
        return $columns;
    }
    public function show( $column, $post_id ) {
        switch ( $column ) {
            case 'column_id':
                echo 'Column content';
                break;
            // More columns
        }
    }
}

Question is, how can I define columns that should be filterable and/or sortable?

I tried to understand your code in the plugin classes and saw some methods, but I couldn't figured it out how to do a setup for such a column.

Thanks in advance for any hint
Juergen