import { Effect } from "@effect/core/io/Effect/definition";
/**
 * Returns an effect that will be executed at most once, even if it is
 * evaluated multiple times.
 * @tsplus getter effect/core/io/Effect once
 * @tsplus location "@effect/core/io/Effect/operations/once"
 */
export declare function once<R, E, A>(self: Effect<R, E, A>): Effect<never, never, Effect<R, E, void>>;
//# sourceMappingURL=once.d.ts.map