/// <reference types="node" />
import { EventEmitter } from 'events';
import XAPI from '.';
import { Handler, Listener, Path } from './types';
export declare type FeedbackInterceptor = (payload: any, emit: (payload: any) => void) => void;
export interface FeedbackId {
    Id: number;
}
export interface Registration {
    (): void;
    registration: Promise<FeedbackId>;
}
export declare class FeedbackGroup {
    private handlers;
    constructor(handlers: Handler[]);
    add(handler: Handler): this;
    remove(handler: Handler): this;
    off(): this;
}
export default class Feedback {
    readonly xapi: XAPI;
    readonly interceptor: FeedbackInterceptor;
    readonly eventEmitter: EventEmitter;
    constructor(xapi: XAPI, interceptor?: FeedbackInterceptor);
    on(path: Path, listener: Listener): Registration;
    once<T = any>(path: Path, listener: Listener): Registration;
    off(): void;
    dispatch(data: any): this;
    group(handlers: Handler[]): FeedbackGroup;
}