concept G22Network > ConceptWithChangeListeners {
  settableWithVar S description;
  Cl<G22NetworkElement> elements = syncL();
  settableWithVar int magneticDistance;
  
  toString { ret or2(description, super.toString()); }
  
  void doMagneticConnections {
    deleteMagneticConnections();
  }
  
  void deleteMagneticConnections {
    for (cable : allCables())
      if (cable.isAutomatic())
        cable.remove();
  }
  
  Set<G22NetworkCable> allCables() {
    new Set<G22NetworkCable> set;
    for (element : elements)
      for (port : element.ports())
        addIfNotNull(set, port.cable);
    ret set;
  }
}