export interface JsonFileOptions<T> {
    defaultJson?: T;
    transform?(data: Partial<T>): T;
}
export declare class JsonFile<T> {
    private $path;
    private $options?;
    readonly $fileExists: boolean;
    readonly $data?: T;
    private constructor();
    static load<T extends Record<string | symbol, unknown> | undefined>(path: string, options?: JsonFileOptions<T>): JsonFile<T> & T;
    $save(): void;
    get $dirname(): string;
}