const context = new Context({
            dispatcher: new Dispatcher(),
            store: storeGroup
        });
        context.events.onDispatch((payload, meta) => {
            // payload is instanceof StoreChangedPayload in some times
        });

// UseCase
class ExampleUseCase extends UseCase {
    execute() {
        this.dispatch({ type: "update" });
    }
}

// Store
class ExampleStore extends Store {
    constructor() {
        super();
        this.state = {};
    }

    receivePayload(payload) {
        if (payload.type === "update") {
            this.setState({ value: "new value" });
        }
    }

    getState() {
        return this.state;
    }
}