import { GraphxrEvent } from "./on";
export type ObserveCallback = () => void;
/**
 * Convert an async API event, like 'change', into an Iterator.
 * Useful in Grove to define variables which react to data changes
 * @category Events
 * @since 0.0.53
 * @example
 * ```js
 * personaNodes = observe(
 *   'change',
 *   () => api.getLayoutGraph().getNodes().filter(api.nodesByCategory('Persona'))
 * )
 * ```
 */
export declare function observe<T>(event: GraphxrEvent, compute: ObserveCallback): Iterator<T>;