import type { FiberRef } from "./fiberRef";
/**
 * Atomically modifies the `FiberRef` with the specified function.
 *
 * @ets_data_first update_
 */
export declare function update<A>(f: (a: A) => A): (self: FiberRef<A>) => import("../Effect").UIO<void>;
/**
 * Atomically modifies the `FiberRef` with the specified function.
 */
export declare function update_<A>(self: FiberRef<A>, f: (a: A) => A): import("../Effect").UIO<void>;
//# sourceMappingURL=update.d.ts.map