What is the BLoC pattern, and how does it genuinely separate your app's own business logic from its user interface using genuine Streams and events?

BLoC, meaning Business Logic Component, is a genuinely well established state management pattern that properly separates your app's own actual business logic from its user interface by having the UI dispatch specific events, such as a genuine button tap or a completed form submission, into a BLoC, which then processes that particular event and properly emits a genuinely new resulting state back out through a Stream, and your widgets simply listen to that particular emitted state stream and rebuild themselves accordingly, keeping your actual business logic completely testable and fully independent of any specific Flutter widget code whatsoever.

class CounterBloc extends Bloc<CounterEvent, int> {
  CounterBloc() : super(0) {
    on<Increment>((event, emit) => emit(state + 1));
  }
}