/**
    cyrb53 (c) 2018 bryc (github.com/bryc)
    License: Public domain (or MIT if needed). Attribution appreciated.
    A fast and simple 53-bit string hash function with decent collision resistance.
    Largely inspired by MurmurHash2/3, but with a focus on speed/simplicity.
*/
export declare const cyrb53: (str: string, seed?: number) => number;
/**
 * Be careful changing this function, it will affect the rollout percentage.
 * This hash function was picked because it's simple and fast and only needs
 * to split across 100 buckets.
 */
export declare const hashPct: (flag_key: string, value: string, pct: number) => boolean;