import { Message, OutputData, OutputMessage } from '../../types';
export declare class MessageBuilder {
    private static readonly defaultHeaders;
    private static _payload;
    private static _headers;
    static fromMessagePayload(message: OutputMessage): typeof MessageBuilder;
    static fromMessageHeaders(message: Message): typeof MessageBuilder;
    static withPayload(payload: OutputData): typeof MessageBuilder;
    static setHeader(key: string, value: string): typeof MessageBuilder;
    static setHeaderIfAbsent(key: string, value: string): typeof MessageBuilder;
    static build(): OutputMessage;
}