import { Timestamp } from '@firebase/firestore';
interface F {
    seconds: number;
    nanoseconds: number;
}
/**
 * 時間を文字に変換
 * @param payload Date | Timestamp | string | null
 * @param format YYYY/MM/DD hh:mm:ss
 */
export declare const dateFormat: (payload: Date | Timestamp | string | null | undefined | F, format?: string) => string;
export {};
