title: Wordpress custom plugin release declined of the reason 'Calling core loading files directly'
body: <p>I have developed a plugin for myself and was using it for a little and after decided to go public. But the plugin got declined after submission and code review with the reason ##Calling core loading files directly. I fixed already all issues they mentioned, but only one bothering me now. I have <code>require_once( ABSPATH.'/wp-admin/includes/upgrade.php' );</code> in few places to use dbDelta(), but if I will remove <code>require_once</code> declaration I won't be able to use dbDelta(). Do you think it will be an issue with second code review? Any developer who already did and released their plugins? </p>