import * as T from "../../Task/_core";
import type { Task } from "../../Task/model";
import type { XPromise } from "../model";
/**
 * Returns a task that keeps or breaks a promise based on the result of
 * this effect. Synchronizes interruption, so if this effect is interrupted,
 * the specified promise will be interrupted, too.
 */
export declare const to: <E, A>(p: XPromise<E, A>) => <R>(effect: T.Task<R, E, A>) => T.Task<R, never, boolean>;
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