this.id = id; this.subsystem = subsystem; this.setChoiceSetAdapter(choiceSetAdapter);
  ChoiceSetImpl  	(Signet						signet,  	 Subsystem				subsystem,     ChoiceSetAdapter	choiceSetAdapter,  	 String						id)  {    super();    this.id = id;    this.subsystem = subsystem;    this.setChoiceSetAdapter(choiceSetAdapter);    this.choices = new HashSet();        ((SubsystemImpl)subsystem).add(this);  }