initState method
Implementation
void initState(String key, dynamic initialValue) {
if (key == "#init") {
throw Exception("You can't update #init");
}
if (initialValue == null) {
throw Exception("initialValue can't be null");
}
if (__globalState.containsKey(key)) {
return;
}
__globalState = {...__globalState, key: initialValue, "#init": key};
}