export interface JsonWriteOptions {
    spaces?: number;
    backupTo?: string;
}
export declare class JsonFileStoreService {
    private readonly locks;
    read<T>(path: string): Promise<T>;
    mutate<T>(path: string, mutator: (current: T | null) => T | null | undefined | Promise<T | null | undefined>, opts?: JsonWriteOptions): Promise<T | null | undefined>;
    write<T>(path: string, data: T, opts?: JsonWriteOptions): Promise<void>;
    private withLock;
    private atomicWrite;
}