CategoryImpl (SubsystemImpl 	subsystem, String 				id, String 				name, Status 				status)
public CategoryImpl()
  CategoryImpl  	(SubsystemImpl 	subsystem,  	 String 				id,  	 String 				name,  	 Status 				status)  {      super(subsystem.getSignet(), id, name, status);      this.subsystem = subsystem;      this.functions = new HashSet();  }