import { Json } from './types';
export declare const session: {
    getString: (key: string) => string;
    setString: (key: string, value: string) => void;
    getBoolean: (key: string, defaultValue?: boolean) => boolean;
    setBoolean: (key: string, value: boolean) => void;
    getJson: (key: string) => Json | null;
    setJson: (key: string, json: Json) => void;
    patchJson: (key: string, change: Json) => void;
};