export declare class Unique {
    maxTime: number;
    maxRetries: number;
    constructor();
    /**
     * unique
     *
     * @method unique
     */
    unique<Method extends (args: Args) => string, Args extends any[]>(method: Method, args: Args, opts?: {
        startTime?: number;
        maxTime?: number;
        maxRetries?: number;
        currentIterations?: number;
        exclude?: string | string[];
        compare?: (obj: Record<string, string>, key: string) => 0 | -1;
    }): string;
}