registerWidgets function
Implementation
void registerWidgets(TargetPlatform platform) {
if ( platform == TargetPlatform.iOS || platform == TargetPlatform.macOS) {
ValuedWidget.platform = "iOS";
registerCupertinoWidgets();
}
else if ( platform == TargetPlatform.android) {
ValuedWidget.platform = "material";
registerMaterialWidgets();
}
else
throw Exception("unsupported platform $platform");
}