sclass G22NetworkCable {
  settable G22NetworkElement.Port from;
  settable G22NetworkElement.Port to;
  
  // was this made by magnetic connection?
  settable bool isAutomatic;
  
  void connect {
    from.cable(this);
    to.cable(this);
  }
  
  void remove {
    from?.cable(null);
    to?.cable(null);
  }
  
  toString { ret renderVars("G22NetworkCable", +from, +to, +isAutomatic); }
}