mutate method
Notify the underlying state that the internal data has changed.
Whenever you mutate the state's data, do it within a function that you pass to mutate
:
state.mutate(() { state.value = newValue });
The provided callback is immediately called synchronously. It must not
return a future (the callback cannot be async
), since then it would be
unclear when the state was actually being set.
Implementation
Future<void> mutate(void Function() mutation) async {
try {
preMutate();
mutation();
_subject.add(this);
postMutate();
} catch(e, st) {
this.onError(e, st);
}
}