CounterBloc constructor
CounterBloc()
The initial state of the CounterBloc
is 0.
Implementation
CounterBloc() : super(0) {
/// When an `Increment` event is added,
/// the current `state` of the bloc is accessed via the `state` property
/// and a new state is emitted via `emit`.
on<Increment>((event, emit) => emit(state + event.amount));
}