import { AnyActorRef, OutputFrom } from "./types.js";
/**
 * Returns a promise that resolves to the `output` of the actor when it is done.
 *
 * @example
 *
 * ```ts
 * const machine = createMachine({
 *   // ...
 *   output: {
 *     count: 42
 *   }
 * });
 *
 * const actor = createActor(machine);
 *
 * actor.start();
 *
 * const output = await toPromise(actor);
 *
 * console.log(output);
 * // logs { count: 42 }
 * ```
 */
export declare function toPromise<T extends AnyActorRef>(actor: T): Promise<OutputFrom<T>>;