/**
 * This kinda follows the Jquery.Deferred type idea.
 * @see https://api.jquery.com/jQuery.Deferred/
 *
 * Deferred is mostly a promise, but you can resolve or reject it from outside.
 * This 'Deferred' here is a much more limited version of the JQuery Deferred.
 */
export type Deferred<T> = {
    promise: Promise<T>;
    resolve: (value: T) => void;
    reject: (reason: unknown) => void;
    isSettled(): boolean;
};
export declare function createDeferred<T>(): Deferred<T>;