If this mixin is added to a plugin the directory the plugin class is defined in is added to the list of
INSTALLED_APPS in the InvenTree server configuration.
Only use this mixin if you have an understanding of djangos app system. Plugins with this mixin are deeply integrated into InvenTree and can cause difficult to reproduce or long-running errors. Use the built-in testing functions of django to make sure your code does not cause unwanted behaviour in InvenTree before releasing.