selfPopulateExtraProperties method
Implementation
Future<void> selfPopulateExtraProperties() async {
//Consulting product manager, the user opt out will only be calculated by what the user selected in their operating system definitions. Not by publisher.
_extraProperties[TBLProperties.USER_OPT_OUT_KEY] =
TBLProperties.boolToString((await TBLSdkPlugin.isUserOptOut()));
}