/**
 * @param {string} filename
 * @returns {string}
 */
export function guessLanguageFromFilename(filename: string): string;
/**
 * @param {Object} obj
 * @returns {boolean}
 */
export function isArray(obj: any): boolean;
/**
 * @param {Function} func
 * @param {number} wait
 * @param {boolean} [immediate]
 * @returns {Function}
 */
export function debounce(func: Function, wait: number, immediate?: boolean): Function;