/**
 * @documentation true
 * @sectionName Base64
 */
/**
 * Encode string with base64 encoding.
 * @signature
 *    P.base64encode(str)
 * @example
 *    P.base64encode("ts-prime is awesome") //=> dHMtcHJpbWUgaXMgYXdlc29tZQ==
 * @category Utility
 */
export declare function base64encode(input: string): string;
/**
 * Decode base64 encoded string.
 * @signature
 *    P.base64decode(str)
 * @example
 *    P.base64decode("dHMtcHJpbWUgaXMgYXdlc29tZQ==") //=> ts-prime is awesome
 * @category Utility
 */
export declare function base64decode(input: string): string;
/**
 * Encode UTF8 characters
 * @category Utility
 */
export declare function encodeUTF8(input: string): string;
/**
 * Decode UTF8 encoded characters
 * @category Utility
 */
export declare function decodeUTF8(utftext: string): string;
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