wpsnoop wp-content/themes/new-blog/inc/upgrade-to-pro/ directory is used by 3 plugins/themes
WordPress files make up the basic building blocks of plugins and themes.
This page provides some information on the wp-content/themes/new-blog/inc/upgrade-to-pro/ file and a list of plugins and themes that implement it.
The following 3 plugins create a directory called wp-content/themes/new-blog/inc/upgrade-to-pro/: