/**
 * Original work Copyright (c) 2018 PoC-Consortium
 * Modified work Copyright (c) 2019 Burst Apps Team
 */
/**
 * Converts/Decodes a Base64 encoded string to string. UTF-8 is supported
 * Inverse function {@link convertStringToBase64String}
 * @param b64 The string to be decoded (either URI encoded or not)
 * @return {string} The original string
 *
 * @category conversion
 */
export declare const convertBase64StringToString: (b64: string) => string;