/*! http://mths.be/base64 v0.1.0 by @mathias | MIT license */
export declare class Base64 {
    InvalidCharacterError: (message: any) => void;
    private static error;
    private static TABLE;
    private static REGEX_SPACE_CHARACTERS;
    static decode(input: any): string;
    static encode(input: any): string;
}