} else { Log.error("Error: The group to add to is null"); return null; }
  public Group removeFromGroup (Group groupObject) {    if (groupObject != null)  {      if (groupMemberHash.contains(groupObject))  {        //this object does belong to the indicated Group object        groupObject.removeMemberObject((Object) this);        groupMemberHash.remove(groupObject);        return groupObject;      }      else {        Log.error("Can't delete from group.  not a member of the group" +                            groupObject.getName());        return null;      }    }    else {      Log.error("Error: The group to add to is null");      return null;    }  }