export declare class OctreeCache<T> {
    private readonly cache;
    set(x: number, y: number, z: number, level: number, item: T): void;
    get(x: number, y: number, z: number, level: number): T | undefined;
    remove(x: number, y: number, z: number, level: number): void;
    clear(): void;
    private makeKey;
}
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