/**
 * Portable, streaming, non-cryptographic 64-bit hash (cyrb53), emitted as 16 hex chars. Feed it in
 * chunks with {@link update} (so callers can hash data larger than a single string) and read the result
 * with {@link digest}. Used for content/update detection where a stable, fast digest is enough; browser-safe
 * (no node `crypto`, so it also works in the bundled/web build).
 *
 * cyrb53 is a public-domain hash by `bryc`.
 */
export declare class Hash53 {
    private h1;
    private h2;
    update(str: string): this;
    digest(): string;
}