/**
 * Seedable deterministic PRNG.
 *
 * The fuzzer's reproducibility contract requires that running with the
 * same seed produces bit-identical inputs. A `Math.random()`-style
 * non-seeded source breaks that.
 *
 * Implementation: mulberry32. 32-bit state, decent statistical
 * quality for non-cryptographic use, fits in 8 lines. Period 2^32 —
 * more than enough for a fuzz budget that's typically <10^4 calls.
 *
 * Reference: https://gist.github.com/tommyettinger/46a3a48676ef5ec4a4e4
 */
export declare class Prng {
    private state;
    constructor(seed?: number);
    /** Uniform [0, 1). */
    next(): number;
    /** Integer in [lo, hi). */
    intInRange(lo: number, hi: number): number;
    /** Pick a random element of an array. Throws on empty. */
    pick<T>(items: readonly T[]): T;
    /** Bias coin — true with probability p (0..1). */
    bool(p?: number): boolean;
}
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