export declare class CacheEntry<T> {
    constructor(cache: Cache, key: string | null, value: T, visited?: Set<string>);
    readonly proxy?: T & object;
    readonly isPrimitive: boolean;
    readonly primitiveValue: string | number | bigint | boolean | undefined | symbol | null;
    readonly fields: Map<string | symbol, CacheEntry<any>>;
    readonly cache: Cache;
    readonly key: string | null;
    get value(): string | number | bigint | boolean | symbol | (T & object) | null | undefined;
}
export declare class Cache {
    #private;
    getKey(value: any): string | null;
    getOrUpdateCacheEntry<T>(value: T, visited?: Set<string>): CacheEntry<T>;
}