/**
 * Converts a Base64 encoded string to a Blob object.
 *
 * @param b64Data - The Base64 encoded string.
 * @param contentType - The MIME content type of the data.
 * @param sliceSize - The size of the slices to process.
 * @returns The Blob object containing the decoded data.
 * @example
 * const b64String = '...';
 * const contentType = 'image/png';
 * const blob = base64ToBlob(b64String, contentType);
 */
export declare const base64ToBlob: (b64Data: string, contentType?: string, sliceSize?: number) => Blob;