export declare type nullableString = string | null;
export declare type nullableDate = Date | null;
export interface IKnownType {
    getType(): string;
}
export declare function dateFromJson(json: any): Date | null;
export declare function dateToJson(date: Date): {
    _type: string;
    value: string;
};
export declare function copyEntriesToJsonObject(dict: any, jsonObj: any): void;
export declare function createDictionaryFromJsonObject(jsonObj: any): any;