throw new ModelException(ERR_ACTM);
throw new ModelException(E.GROUP_ACTM);
  protected static void canAddCompositeMember(Group g, Composite c)    throws  InsufficientPrivilegeException,            ModelException,            SchemaException  {    Field f = Group.getDefaultList();    isTypeEqual(f, FieldType.LIST);    canWriteField(g.getSession(), g, g.getSession().getSubject(), f);    if (g.hasComposite()) {      throw new ModelException(ERR_ACTC); // TODO TEST!    }    if (g.getMembers().size() > 0) {      throw new ModelException(ERR_ACTM); // TODO ModelException    }  } // protected static void canAddCompositeMember(g, c)