shutdown method
Shut down the SDK and optionally delete all local SDK data.
NOTE: Care should be taken when using this method as deleting the SDK data will make it reset back to a first install state.
Implementation
void shutdown(bool deleteData) {
// Listeners
_initCompletedCallback = null;
// Registered values
_registeredAndroidAppGuid = null;
_registeredIosAppGuid = null;
_registeredPartnerName = null;
// Native
_invokeChannel("shutdown", deleteData);
}