/**
 * Splits a string into chunks of the specified length. Surrogate-pair safe,
 * so characters outside the Basic Multilingual Plane are not split.
 * @param {string} string_ - Input string
 * @param {number} length - Maximum length of each chunk
 * @returns {string[]} Array of string chunks
 * @example
 * splitByLength("abcdefg", 3); // ["abc", "def", "g"]
 */
export declare const splitByLength: (string_: string, length: number) => string[];