reviseAddChild method
Implementation
AFRouteSegmentChildren reviseAddChild(AFRouteParam param) {
  final revised = Map<AFID, AFRouteSegment>.from(children);
  AFID? wid = param.wid;
  if(wid.isKindOf(AFUIWidgetID.useScreenParam)) {
    wid = param.screenId;
  }
  revised[wid] = AFRouteSegment(param: param, children: null, createDefaultChildParam: null);
  return AFRouteSegmentChildren(children: revised);
}