import { EventCallback, EventSubscription, Unsubscribe } from '@skewedaspect/sage';
/**
 * Subscribes a handler on the engine bus for as long as the component is mounted, and answers with the
 * teardown for a component whose subscription ends before it does. The subscription is an event type in
 * the map or a pattern over it, and the handler runs from a drain (design/ui.md#hearing-events).
 */
export declare function useSageEvent<Subscription extends EventSubscription>(subscription: Subscription, handler: EventCallback<Subscription>): Unsubscribe;