/**
 * Returns a string with at least 64-bits of randomness.
 *
 * Doesn't trust Javascript's random function entirely. Uses a combination of
 * random and current timestamp, and then encodes the string in base-36 to
 * make it shorter.
 *
 * From: https://medium.com/este-js-framework/its-ok-to-use-javascript-generated-guid-in-a-browser-373ca6431cf7
 * Code: https://github.com/google/closure-library/blob/555e0138c83ed54d25a3e1cd82a7e789e88335a7/closure/goog/string/string.js#L1177
 *
 * @return {string} A random string, e.g. sn1s7vb4gcic.
 */
export declare function getRandomString(): string;
export declare function reflow(el: HTMLElement): number;