## Plugin Updater Issues

A plugin updater issue occurs when a plugin includes its own update mechanism instead of relying on the WordPress.org update system.

Using the case as a reference, check the code to determine if the plugin is implementing a custom update mechanism.

Details:
- Plugins hosted on WordPress.org must not include their own update mechanisms.
- Common patterns: hooking into `pre_set_site_transient_update_plugins`, `site_transient_update_plugins`, or using custom update checker libraries.
- Libraries like `plugin-update-checker`, `YahnisElsts/plugin-update-checker`, or custom classes that check external servers for updates are not allowed.
- If the code is part of a library that is excluded by default (e.g., in a `vendor/` directory), it may not be flagged.
- License key validation that gates features (not updates) is a separate concern.
- Auto-update UI modifications (enabling/disabling WordPress core auto-updates) are generally acceptable.