PluginPreUninstallEvent example

$uninstallContext = new UninstallContext(
            $pluginBaseClass,
            $shopwareContext,
            $this->shopwareVersion,
            $plugin->getVersion(),
            $this->createMigrationCollection($pluginBaseClass),
            $keepUserData
        );
        $uninstallContext->setAutoMigrate(false);

        $this->eventDispatcher->dispatch(new PluginPreUninstallEvent($plugin, $uninstallContext));

        if (!$shopwareContext->hasState(self::STATE_SKIP_ASSET_BUILDING)) {
            $this->assetInstaller->removeAssetsOfBundle($pluginBaseClassString);
        }

        $pluginBaseClass->uninstall($uninstallContext);

        if (!$uninstallContext->keepUserData()) {
            $pluginBaseClass->removeMigrations();
            $this->systemConfigService->deletePluginConfiguration($pluginBaseClass);
        }