export type Rng = () => number;
/** mulberry32 — small, fast, deterministic PRNG. */
export declare function makeRng(seed: number): Rng;
export declare function sampleWithoutReplacement<T>(items: T[], k: number, rng: Rng): T[];
export declare function weightedPick<T>(weighted: {
    item: T;
    weight: number;
}[], rng: Rng): T;