Fix issue: Column::callback(): Argument #1 ($columns) must be of type…

[code23-barna]

Error message:

Column::callback(): Argument #1 ($columns) must be of type string, array given

Issue:

In src/Column.php:118 you set the type to "string" when it should be Array|String

[code23-barna]

To reproduce the issue use something like this in your columns() method:

 Column::callback(['id', 'title'], function ($id, $title) {
    return $id.': '.$title;
});