asclass DynTableWithInput2<A> extends DynObjectTable<A> {
  switchable S input;
  transient JTextField tfInput;
  transient ReliableSingleThread rstCalc = dm_rst(this, r calc);
  
  visual northAndCenterWithMargins(tfInput = dm_textField input(),
    mainComponent());
    
  JComponent mainComponent() { ret super.visualize(); }
  
  start {
    dm_watchFieldAndNow input(rstCalc);
  }
  
  abstract void calc();
}

Began life as a copy of #1021502