handleTrack method
Implementation
void handleTrack(MethodCall call) {
Map<Object?, Object?> args = call.arguments as Map<Object?, Object?>;
String eventName = args['eventName'] as String;
dynamic properties = args['properties'];
Map<String, dynamic> props = {
..._mixpanelProperties,
...(properties ?? {})
};
track(eventName, js.jsify(props));
}