export type Data = {
    [key: string]: Data;
} | Array<Data> | string | number | boolean | null;
export declare const isNull: (value: unknown) => value is null;
export declare const isBoolean: (value: unknown) => value is boolean;
export declare const isNumber: (value: unknown) => value is number;
export declare const isString: (value: unknown) => value is string;
export declare const isArray: (value: unknown) => value is Array<Data>;
export declare const isObject: (value: unknown) => value is {
    [key: string]: Data;
};