sendEvent method
Implementation
void sendEvent(String name, [Map<String, dynamic>? arguments]) {
_setupEventChannelIfNeeded();
final controllers = _eventControllers[name];
if (controllers != null && controllers.isNotEmpty) {
for (final controller in controllers) {
controller.add(<String, dynamic>{if (arguments != null) ...arguments, _kEventNameKey: name});
}
}
}