Servlet invocation other than through resourceType and resourcePaths.

IN the below code what does "webconsole.configurationFactory.nameHint =" + "Site Map for: {externalizer.domain}, on resource types: [{sling.servlet.resourceTypes}]" mean?

@Component(service = Servlet.class,
        property = {
                "sling.servlet.methods=GET",
                Constants.SERVICE_DESCRIPTION + "= Sitemap Index Servlet",
                "sling.servlet.extensions=" + "xml",
                "webconsole.configurationFactory.nameHint =" + "Site Map for: {externalizer.domain}, on resource types: [{sling.servlet.resourceTypes}]"
        })