import * as T from "../../Task/_core";
import type { XPromise } from "../model";
/**
 * Checks for completion of this Promise. Produces true if this promise has
 * already been completed with a value or an error and false otherwise.
 */
export declare const isDone: <E, A>(promise: XPromise<E, A>) => T.IO<boolean>;
//# sourceMappingURL=isDone.d.ts.map