You could use postbox_classes
filter as follow:
add_filter( 'postbox_classes_dashboard_widget2', function ( $classes ) {
// $classes is an array; add your custom classes to the array
$classes[] = 'my-class';
return $classes;
} );
You could use postbox_classes
filter as follow:
add_filter( 'postbox_classes_dashboard_widget2', function ( $classes ) {
// $classes is an array; add your custom classes to the array
$classes[] = 'my-class';
return $classes;
} );