protected function isPluginInstalled(SolrAdminService $adminService)
    {
        $accessFilterQueryParserPluginInstalled = false;

        $pluginsInformation = $adminService->getPluginsInformation();
        if (isset($pluginsInformation->plugins->OTHER->{self::PLUGIN_CLASS_NAME})) {
            $accessFilterQueryParserPluginInstalled = true;
        }

        return $accessFilterQueryParserPluginInstalled;
    }