savePluginConfiguration example

$pluginData['version'] = $updateVersion;
                $plugin->setVersion($updateVersion);
                $pluginData['upgradeVersion'] = null;
                $plugin->setUpgradeVersion(null);
                $upgradeDate = new \DateTime();
                $pluginData['upgradedAt'] = $upgradeDate->format(Defaults::STORAGE_DATE_TIME_FORMAT);
                $plugin->setUpgradedAt($upgradeDate);
            }

            $this->eventDispatcher->dispatch(new PluginPreInstallEvent($plugin, $installContext));

            $this->systemConfigService->savePluginConfiguration($pluginBaseClass, true);

            $pluginBaseClass->install($installContext);

            $this->customEntityLifecycleService->updatePlugin($plugin->getId(), $plugin->getPath() ?? '');

            $this->runMigrations($installContext);

            $installDate = new \DateTime();
            $pluginData['installedAt'] = $installDate->format(Defaults::STORAGE_DATE_TIME_FORMAT);
            $plugin->setInstalledAt($installDate);