interface Deferrable<T> {
    readonly promise: Promise<T>;
    readonly resolve: (value: T | PromiseLike<T>) => void;
    readonly reject: (reason?: any) => void;
}
/**
 *
 * @returns a deferred promise that can be resolved or rejected from outside of the promise
 */
export declare function defer<T = unknown>(): Promise<T> & Deferrable<T>;
export {};