/**
 * Split an array into multiple chunks of a certain size.
 */
export declare function chunkArray<T>(array: T[], chunkSize: number): T[][];
/**
 * Split a string into multiple chunks of a certain size.
 */
export declare function chunkString(input: string, chunkSize: number): string[];
/**
 * Generate an array of ranges of a certain size between two numbers.
 *
 * For example, calling `makeRanges(0, 678, 250)` will return:
 * ```
 * [ [ 0, 250 ], [ 250, 500 ], [ 500, 678 ] ]
 * ```
 */
export declare function makeRanges(from: number, to: number, size: number): number[][];
/**
 * Wait for a number of milliseconds.
 */
export declare function sleep(ms: number): Promise<void>;