I want to have a columnspan of 2 on mobile and 3 on desktop. But I cant get it working. Already tried this: ```php public function getColumnSpan(): int|string|array { return [ 'default' => 2, 'md' => 3, ]; } public function getColumnStart(): int|string|array { return [ 'default' => 2, 'md' => 3, ]; } ```