code: public static IEntityGroup getDistinguishedGroup(String name) throws GroupsException {
          LOGGER.trace("Invoking getDistinguishedGroup for name='{}'", name);
          return instance().igetDistinguishedGroup(name);
      }
docs: Refers to the PropertiesManager to get the key for the group associated with 'name' and asks
  the group store implementation for the corresponding <code>IEntityGroup</code>.