import SDKUserInfo from "./SDKUserInfo";
export default class SDKUserInfos {
    private _userIds;
    private _userInfos;
    constructor();
    getUserInfoById(userId: string): SDKUserInfo;
    getUserInfoByIndex(index: number): SDKUserInfo;
    isHasUserById(userId: string): boolean;
    addUserInfo(user: SDKUserInfo): boolean;
    removeUserById(userId: string): boolean;
    ClearUsersFlag(): void;
    getCount(): number;
    getTeacherId(): string;
}