as3cf_local_domains filter not working

I tried that plugin (https://github.com/deliciousbrains/wp-amazon-s3-and-cloudfront-tweaks) but it is not work as3cf_local_domains.

and

function as3cf_local_domains( $domains ) {
$domains[] = ‘wibble.example.com’;
$domains[] = ‘wobble.example.com’;

return $domains;
}
add_filter( ‘as3cf_local_domains’, ‘as3cf_local_domains’, 10, 1 );

I tried so that function and the problem continue.

I use domain mapping plugin (https://github.com/wpmudev/domain-mapping)?

How do I solve the problem?