This member cannot be used in scripts, but is usable in the command bar and plugins.
Fired when the
Plugin is deactivated. This occurs when either the plugin code calls
Plugin/Deactivate, or because some other plugin called
Plugin/Activate, which forces all other plugins to lose their active state.
Plugin/Unloading, fires immediately before the plugin is unloaded or reloaded via uninstallation, deactivation, or updating