import PropTypes from 'prop-types';
import type { IMessage } from '../Models';
export declare const StylePropType: PropTypes.Requireable<number | boolean | object>;
export declare const isSameDay: (currentMessage: IMessage, diffMessage: IMessage | null | undefined) => boolean;
export declare const isSameUser: (currentMessage: IMessage, diffMessage: IMessage | null | undefined) => boolean;