interface LMCallback {
    login(): void;
}
export type RefreshTokenExpired = () => {
    accessToken: string;
    refreshToken: string;
};
export type AccessTokenExpiredAndRefreshed = (accessToken: string, refreshToken: string) => void;
export default LMCallback;
export declare abstract class LMSDKCallbacks {
    constructor();
    abstract onAccessTokenExpiredAndRefreshed(accessToken: string, refreshToken: string): void;
    abstract onRefreshTokenExpired(): {
        accessToken: string;
        refreshToken: string;
    } | Promise<{
        accessToken: string;
        refreshToken: string;
    }> | null;
}