docs: @Override
      public void updateMembers() throws GroupsException {
  
          // Track objects to invalidate
          Set<IGroupMember> invalidate = new HashSet<>();
          invalidate.addAll(getAddedMembers().values());
          invalidate.addAll(getRemovedMembers().values());
  
          getLocalGroupService().updateGroupMembers(this);
          clearPendingUpdates();
  
          // Invalidate objects that changed their relationship with us
          this.invalidateInParentGroupsCache(invalidate);
      }