PermissionImpl (SubsystemImpl 	subsystem, String 				id, Status					status)
public PermissionImpl()
  PermissionImpl    (SubsystemImpl 	subsystem,     String 				id,     Status					status)  {    super(subsystem.getSignet(), id, null, status);    this.setSubsystem(subsystem);    this.functions = new HashSet();    this.limits = new HashSet();  }