private Map<Pair<String, String>, String> getUrlOverrides(String serviceName, Collection<Filter> filters) {
    return filters.stream()
      .filter( f -> f instanceof LinkNameFilter && null != ((LinkNameFilter)f).getLinkUrl() )
      .map( f -> {
        LinkNameFilter lnf = (LinkNameFilter)f;
        return Pair.of(Pair.of(serviceName, lnf.getLinkName()), lnf.getLinkUrl());
      })
      .collect( toMap(Pair::getKey, Pair::getValue) );
  }
Map of (service name, link name) -> url
ambari-server/src/main/java/org/apache/ambari/server/state/quicklinksprofile/DefaultQuickLinkVisibilityController.java