export declare const EJSON: {
    clone: (rootVal: any) => any;
    equals: (a: any, b: any, options?: any) => any;
    isBinary: (obj: Uint8Array & import("./utils").PolyfillableArray) => boolean;
    parse: (item: any) => any;
    stringify: (item: any, options?: import("./stringify").StringifyOptions) => string;
    fromJSONValue: (item: any) => any;
    toJSONValue: (item: any) => any;
    newBinary: (len: number) => import("./utils").PolyfillableArray | Uint8Array<ArrayBuffer>;
    /**
     * @summary Add a custom datatype to EJSON.
     * @locus Anywhere
     * @param {String} name A tag for your custom type; must be unique among
     *                      custom data types defined in your project, and must
     *                      match the result of your type's `typeName` method.
     * @param {Function} factory A function that deserializes a JSON-compatible
     *                           value into an instance of your type. This should
     *                           match the serialization performed by your
     *                           type's `toJSONValue` method.
     */
    addType(name: string, factory: any): void;
    _isCustomType(obj: any): boolean;
    _getTypes(isOriginal?: boolean): unknown;
    _getConverters(): any;
    _adjustTypesToJSONValue: (obj: any) => any;
    _adjustTypesFromJSONValue: (obj: any) => any;
};