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sclass WebNode implements _SetField {
  Web web;
  O labels;

  public void _setField(S f, O x) {
    if (f.equals('web)) web = (Web) x;
    else if (f.equals('labels)) labels = (L) x;
  }
  
  *() {}
  *(Web *web) { web.fireNewNode(this); }
  
  final O rawLabels() {
    if (labels instanceof S) labels = smallestList_fromList((L) labels);
    ret labels;
  }
  
  void addLabel(S label) {
    labels = smallestList_add(rawLabels(), label);
  }
  
  void addLabel(Lisp label) {
    addLabel(web.unparseLabel(label));
  }
  
  void addLabels(Collection<Lisp> l) { for (Lisp lbl : l) addLabel(lbl); }
  void addStrings(Collection<S> l) { for (S lbl : l) addLabel(lbl); }
  
  bool hasLabel(Lisp label) { ret hasLabel(web.unparseLabel(label)); }
  bool hasLabel(S label) { ret smallestList_contains(rawLabels(), label); }
  
  toString { ret smallestList_l(rawLabels()) == 1 ? str(smallestList_first(rawLabels())) : str(smallestList_toList(rawLabels())); }
  
  int count() { ret 1 + smallestList_l(rawLabels()); }
  S text() { ret (S) smallestList_first(rawLabels()); }
  L<S> texts() { ret smallestList_toList(rawLabels()); }
  
  void relation(S arrow, S b) {
    web.getRelation(this, web.node(b)).addLabel(arrow);
  }
  
  Lisp parseLabel(S l) { ret web.parseLabel(l); }
  S unparseLabel(Lisp l) { ret web.unparseLabel(l); }
  
  L<Lisp> labels() { ret web.parseLabels(texts()); }
  bool hasLabels() { ret smallestList_nempty(rawLabels()); }
  void setLabel(int i, Lisp l) { labels = smallestList_set(rawLabels(), i, web.unparseLabel(l)); }
  
  O visInfo() { ret null; }
  void visInfo(O o) {}
}