/**
 * Simple Dynamics event bus. Designed to be used for simple needs
 * and attached to a window that sub-iframes can access easily so their
 * WebResources can listen for events from across a Dynamics form
 * e.g. a grid select needs.
 */
/** Subscriber takes a simple event object differentiated by type. */
export declare type Subscriber = ({type: string}) => void;
/** A thunk that unsubscribes when called. */
export declare type Cancellable = () => void;
/** Small pubsub, synchronous dispatch. */
export declare class EventBus {
    private subscribers;
    unsubscribe(key: any): void;
    /** Subscriber is just a thunk. Thunk returned unsubscribes. */
    subscribe(subscriber: Subscriber): () => void;
    /** Dispatch an event. All subscribers get all events like redux. */
    dispatch(event: any): void;
}
export default EventBus;
export interface Window {
    eventbus: EventBus;
}