public Map<String, QuickLinksConfigurationInfo> getQuickLinksConfigurationsMap() {
    if (quickLinksConfigurationsMap == null) {
      Map<String, QuickLinksConfigurationInfo> tmp = new TreeMap<>();
      if (quickLinksConfigurations != null) {
        for (QuickLinksConfigurationInfo quickLinksConfiguration : quickLinksConfigurations) {
          tmp.put(quickLinksConfiguration.getFileName(), quickLinksConfiguration);
        }
      }
      quickLinksConfigurationsMap = tmp;
    }
    return quickLinksConfigurationsMap;
  }
Set indicator for required restart after a host rack info change.

@param restartRequiredAfterRackChange true if a restart is required
ambari-server/src/main/java/org/apache/ambari/server/state/ServiceInfo.java