import { ByteArray } from '../types.js';
/**
 * Escapes special characters in a PDF string according to PDF specification.
 * Escapes parentheses, backslashes, and control characters (\n, \r, \t, \b, \f).
 *
 * @param bytes - The byte array or string to escape.
 * @returns A new byte array with escaped characters.
 *
 * @example
 * ```typescript
 * escapeString('Hello (World)') // Escapes the parentheses
 * ```
 */
export declare function escapeString(bytes: ByteArray | string): ByteArray;