/**
 * Generates a random separator of a given length.
 *
 * @param length     The length.
 * @param characters The allowed characters.
 *
 * @returns The separator.
 */
export declare function generateSeparator(length: number, characters: string[]): string;
/**
 * Generates a unique separator for a given text.
 *
 * @param text       The text.
 * @param characters The allowed characters.
 *
 * @returns The separator.
 */
export declare function generateUniqueSeparator(text: string, characters: string[]): string;