register method
Implementation
void register(Object eventName, VoidValueCallback f) {
_eMap[eventName] ??= <VoidValueCallback>[];
_eMap[eventName]!.add(f);
}
void register(Object eventName, VoidValueCallback f) {
_eMap[eventName] ??= <VoidValueCallback>[];
_eMap[eventName]!.add(f);
}