type ToastEventHandler<T = unknown> = {
    bivarianceHack(evt?: T): void;
}['bivarianceHack'];
type EventBus = {
    on<T = unknown>(type: string, fn: ToastEventHandler<T>): void;
    emit<T = unknown>(type: string, evt?: T): void;
    off<T = unknown>(type: string, fn: ToastEventHandler<T>): void;
};
declare global {
    interface VcGlobalSingletons {
        ToastEventBus: EventBus;
    }
}
declare const _default: EventBus;
export default _default;