getPluginFromInput example

$this->validatePluginIsNotManagedByComposer($pluginName, $context);

        try {
            $data = $this->storeClient->getDownloadDataForPlugin($pluginName, $context);
        } catch (ClientException $exception) {
            throw new StoreApiException($exception);
        }

        $this->pluginManagementService->downloadStorePlugin($data, $context);

        try {
            $plugin = $this->getPluginFromInput($pluginName, $context);

            if ($plugin->getUpgradeVersion()) {
                $this->pluginLifecycleService->updatePlugin($plugin, $context);
            }
        } catch (PluginNotFoundException) {
            // don't update plugins that are not installed         }

        return self::SUCCESS;
    }