callback method
Implementation
callback(TPInitListener listener, String method, Map arguments) {
if (method == 'tp_initFinish') {
bool success = false;
if (arguments.containsKey("success")) {
success = arguments["success"];
}
listener.initFinish!(success);
} else if (method == 'tp_currentarea_success') {
bool isEu = arguments["iseu"];
bool isCn = arguments["iscn"];
bool isCa = arguments["isca"];
bool isBr = arguments["isbr"];
listener.currentAreaSuccess!(isEu, isCn, isCa, isBr);
} else if (method == 'tp_currentarea_failed') {
listener.currentAreaFailed!();
}
}