import AssistantV1 from 'ibm-watson/assistant/v1';
import { IReducedMessageResponse } from '../interface/IReducedMessageResponse';
import { Session } from './Session/Session';
/**
 * This class prunes the response from the Watson Assistant (in the V1 format)
 * to the form that is propagated to frontend
 */
export declare class MessageResponseFilter {
    private session;
    constructor(session: Session);
    applyTo(payload: AssistantV1.Response, addons?: Record<string, any>): IReducedMessageResponse;
    error(input: AssistantV1.MessageInput, errorMsg: string): IReducedMessageResponse;
}