anchor.diff:  
     get selected => parent != null && parent.isSelected(value);
   
  +
   }
   
   const FNX_SELECT_DIRECTIVES = const [FnxSelect, FnxOption];
  
positive.code:     parent.options.add(_myValue);
    }
  
  
    @override
    ngOnDestroy() {
  
negative.code: 
  class FnxOptionValue {
    final String id;
    String label;
    dynamic value;
  
    FnxOptionValue(this.id, this.value, this.label);
  
  