import type { Channel as APIChannel } from 'revolt-api';
import { User, Channel, Message } from './index';
import { TextBasedChannel } from './interfaces/index';
import type { Client } from '../client/Client';
import { MessageManager, MessageOptions, UserResolvable } from '../managers/index';
import { ChannelPermissions, ChannelTypes, Collection } from '../util/index';
declare type APIGroupChannel = Extract<APIChannel, {
    channel_type: 'Group';
}>;
export declare class GroupChannel extends Channel<APIGroupChannel> implements TextBasedChannel {
    name: string;
    description: string | null;
    ownerId: string;
    readonly type = ChannelTypes.GROUP;
    permissions: Readonly<ChannelPermissions>;
    icon: string | null;
    messages: MessageManager;
    lastMessageId: string | null;
    users: Collection<string, User>;
    nsfw: boolean;
    constructor(client: Client, data: APIGroupChannel);
    protected _patch(data: APIGroupChannel): this;
    get lastMessage(): Message | null;
    add(user: UserResolvable): Promise<void>;
    remove(user: UserResolvable): Promise<void>;
    leave(): Promise<void>;
    send(options: MessageOptions | string): Promise<Message>;
    iconURL(options?: {
        size: number;
    }): string | null;
    get owner(): User | null;
}
export {};