import { BaseContext } from "./ScopeContext";
export declare type EventBusSubscriber = (ev: FormEvent) => void;
export declare enum FormEventSignal {
    SubmitForm = 0,
    ScopeUpdate = 1,
    FieldCreated = 2,
    FieldUpdate = 3,
    FieldDestroyed = 4
}
export declare type FormEvent = {
    signal: FormEventSignal;
    scope: BaseContext;
    field?: string;
};
export declare class EventBus {
    private _id;
    /**
     * Trigger the bus using the given event context.
     */
    trigger: (ev: FormEvent) => void;
    /**
     * Add a subscriber to the event bus, the returned function will automatically remove
     * the given subscriber.
     */
    listen: (subscriber: EventBusSubscriber) => () => void;
}