public Set<String> getExcludedConfigurationTypes(String service) {
    return excludedConfigurationTypes.containsKey(service) ?
        excludedConfigurationTypes.get(service) :
        Collections.emptySet();
  }
Get the set of excluded configuration types for this service.

@param service service name

@return Set of names of excluded config types. Will not return null.
ambari-server/src/main/java/org/apache/ambari/server/controller/internal/Stack.java