import type { _GKCoherentNoiseSource } from "./GKCoherentNoiseSource.js";
export declare class _GKBillowNoiseSource extends _GKCoherentNoiseSource {
    static alloc(): _GKBillowNoiseSource;
    static new(): _GKBillowNoiseSource;
    init(): _GKBillowNoiseSource;
    static billowNoiseSourceWithFrequency$octaveCount$persistence$lacunarity$seed$(frequency: number, octaveCount: number, persistence: number, lacunarity: number, seed: number): _GKBillowNoiseSource;
    initWithFrequency$octaveCount$persistence$lacunarity$seed$(frequency: number, octaveCount: number, persistence: number, lacunarity: number, seed: number): _GKBillowNoiseSource;
    persistence(): number;
    setPersistence$(value: number): void;
}
