import { Duration } from "@tsplus/stdlib/data/Duration";
import { Schedule } from "@effect/core/io/Schedule/definition";
import { Tuple } from "@tsplus/stdlib/data/Tuple/definition";
/**
 * A schedule that always recurs, increasing delays by summing the preceding
 * two delays (similar to the fibonacci sequence). Returns the current
 * duration between recurrences.
 * @tsplus static ets/Schedule/Ops fibonacci
 * @tsplus location "@effect/core/io/Schedule/operations/fibonacci"
 */
export declare function fibonacci(one: Duration): Schedule<Tuple<[Duration, Duration]>, never, unknown, Duration>;
//# sourceMappingURL=fibonacci.d.ts.map