/** @license MIT License (c) copyright 2010-2017 original author or authors */
export interface DeferrableTask<E, A> {
    run(): A;
    error(e: Error): E;
}
export declare const defer: <E, A>(task: DeferrableTask<E, A>) => Promise<E | A>;
export declare function runTask<E, A>(task: DeferrableTask<E, A>): E | A;