import type { dia } from '@joint/core';
export interface SubscribeHandler {
    readonly subscribe: (onStoreChange: (changedIds?: Set<dia.Cell.ID>) => void) => () => void;
    readonly notifySubscribers: () => void;
}
/**
 * Subscribe handler for managing subscribers and notifying them.
 * This handler allows you to subscribe to changes and notify subscribers when changes occur.
 * @param beforeSubscribe - Optional callback to be called before notifying subscribers.
 * @returns - An object with subscribe and notifySubscribers methods.
 * @group utils
 */
export declare function subscribeHandler(beforeSubscribe?: () => Set<dia.Cell.ID> | undefined): SubscribeHandler;