export declare const isNumber: (x: unknown) => x is number;
/**
 * Clamps number within the inclusive lower and upper bounds.
 *
 * This is like css [clamp(MIN, VAL, MAX)](https://developer.mozilla.org/docs/Web/CSS/clamp).
 * Waiting for the [proposal](https://github.com/tc39/proposal-math-clamp) to be implemented.
 */
export declare const clamp: (lower: number, value: number, upper: number) => number;
export declare const chunk: <T>(array: Array<T> | null | undefined, size?: number) => T[][];